Earthworm Anatomy Review 13754q
Welcome to the 21st century biology classroom of the future. Earthworms (Lumbricus terrestris L. ) are representative animals of phylum Annelida. Examining external and internal structures of an earthworm will reveal some jamor annelid characteristics.
When you enter answers for this test it is lower case sensitive unless directed otherwise. Good Luck and earn high grades! I used Boreal Earthworm Anatomy Review sheet 13754Q. This test has unlimited number of attempts to better help your learning and test-taking skills. Each attempt will result in 35 randomly chosen questions.
Questions and Answers
- 1.
What number is the cuticle?
- A.
1
- B.
18
- C.
32
- D.
40
- E.
43
Correct Answer
A. 1Explanation
The cuticle is the outermost layer of the hair shaft, and it is made up of overlapping scales. It serves as a protective barrier for the inner layers of the hair. In this question, the correct answer is 1, which suggests that the cuticle is the first layer of the hair shaft.Rate this question:
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- 2.
What number is the epidermis?
Correct Answer
2
two - 3.
What structure is number 3?
Correct Answer
circular muscleExplanation
The structure number 3 is a circular muscle. This type of muscle is arranged in a circular pattern and can be found in various parts of the body, such as the digestive system and blood vessels. It functions by contracting and relaxing in a circular motion, allowing for the movement and control of fluids and substances within the body.Rate this question:
- 4.
What structure is number 4?
Correct Answer
longitudinal muscleExplanation
The structure number 4 is the longitudinal muscle. This muscle is responsible for the contraction and relaxation of the organ it is present in, allowing for movement and peristalsis. It runs parallel to the length of the organ and helps in its elongation and shortening.Rate this question:
- 5.
What number is the peritoneum?
- A.
5
- B.
10
- C.
15
- D.
20
- E.
25
- F.
30
- G.
40
Correct Answer
A. 5 -
- 6.
What number is the coelom?
- A.
6
- B.
12
- C.
18
- D.
24
- E.
36
- F.
43
Correct Answer
A. 6Explanation
The question is asking for the number that represents the coelom. The coelom is a fluid-filled cavity in the body of many animals, including humans, that surrounds and protects internal organs. Out of the given options, the number 6 is the correct answer.Rate this question:
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- 7.
What is number 7 for earthworm anatomy?
Correct Answer
dorsal blood vesselExplanation
The number 7 in earthworm anatomy refers to the dorsal blood vessel. The dorsal blood vessel is a major component of the earthworm's circulatory system, running along the length of its body on the upper side. It is responsible for pumping the blood, which carries oxygen and nutrients, throughout the worm's body. The dorsal blood vessel plays a crucial role in maintaining the earthworm's overall health and functioning.Rate this question:
- 8.
Chloragogue layer is an external structure found in the earthworms.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement is false because the chloragogue layer is not an external structure found in earthworms. The chloragogue layer is actually an internal structure found in the earthworm's digestive system. It is responsible for storing and producing glycogen, which is used for energy storage in the worm's body.Rate this question:
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- 9.
What is number 9 in earthworm anatomy?
Correct Answer
intestinal epitheliumExplanation
The number 9 in earthworm anatomy refers to the intestinal epithelium. This is the inner lining of the earthworm's intestine, which is responsible for absorbing nutrients from the ingested soil and organic matter. The intestinal epithelium is composed of specialized cells that have microvilli to increase surface area for absorption. This layer also contains gland cells that secrete mucus to aid in digestion and protect the intestine. Overall, the intestinal epithelium plays a crucial role in the earthworm's digestive system.Rate this question:
- 10.
What structure is number 10 for earthworm anatomy?
- A.
Buccal cavity
- B.
Pharynx
- C.
Intestine
- D.
Seminal Vesicles
- E.
Anus
Correct Answer
C. IntestineExplanation
The correct answer is Intestine. The intestine is the structure that is numbered 10 in earthworm anatomy. The intestine is a long tube-like structure that is responsible for the digestion and absorption of nutrients in the earthworm's body. It plays a crucial role in breaking down food and extracting nutrients before the waste is eliminated through the anus.Rate this question:
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- 11.
What structure is number 11 for earthworm anatomy?
- A.
Typhlosole
- B.
Ventral Blood Vessel
- C.
Setae
- D.
Nerve Cord
- E.
Subneural Vessel
Correct Answer
A. TyphlosoleExplanation
The correct answer is Typhlosole. The typhlosole is a structure found in the intestine of an earthworm. It is a fold in the intestinal wall that increases the surface area for nutrient absorption. This adaptation allows the earthworm to efficiently extract nutrients from the soil it ingests.Rate this question:
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- 12.
What structure is number 12 for earthworm anatomy?
- A.
Typhlosole
- B.
Ventral Blood Vessel
- C.
Setae
- D.
Nerve Cord
- E.
Subneural Vessel
Correct Answer
B. Ventral Blood VesselExplanation
The correct answer is the Ventral Blood Vessel. In earthworm anatomy, the ventral blood vessel is the structure that is numbered 12. This vessel runs along the ventral side of the earthworm and is responsible for transporting blood and nutrients throughout the body. It plays a crucial role in the circulatory system of the earthworm.Rate this question:
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- 13.
What structure is number 13 for earthworm anatomy?
- A.
Typhlosole
- B.
Ventral Blood Vessel
- C.
Setae
- D.
Nerve Cord
- E.
Subneural Vessel
Correct Answer
C. SetaeExplanation
Setae are bristle-like structures found on the body of an earthworm. They help the earthworm to move and anchor itself in the soil. These small, hair-like structures provide traction and grip, allowing the earthworm to crawl and burrow through the ground. Therefore, number 13 in earthworm anatomy refers to setae.Rate this question:
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- 14.
What structure is number 14 for earthworm anatomy?
- A.
Typhlosole
- B.
Ventral Blood Vessel
- C.
Setae
- D.
Nerve Cord
- E.
Subneural Vessel
Correct Answer
D. Nerve CordExplanation
The correct answer is Nerve Cord. The nerve cord is the 14th structure in earthworm anatomy. The nerve cord runs along the ventral side of the earthworm and is responsible for transmitting nerve impulses throughout the body. It plays a crucial role in coordinating the worm's movements and sensory responses.Rate this question:
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- 15.
What structure is number 15 for earthworm anatomy?
- A.
Typhlosole
- B.
Ventral Blood Vessel
- C.
Setae
- D.
Nerve Cord
- E.
Subneural Vessel
Correct Answer
E. Subneural VesselExplanation
The subneural vessel is a structure in earthworm anatomy that is responsible for carrying blood below the nerve cord. It is located ventral to the nerve cord and helps in the transportation of nutrients and waste throughout the worm's body. The subneural vessel plays an important role in the circulatory system of earthworms.Rate this question:
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- 16.
What structure is number 21 for earthworm anatomy?
- A.
Circumpharyngeal Connective
- B.
Anterior Nerve Fibers
- C.
Cerebral Ganglion
- D.
Muscle Fibers
- E.
Pharynx
Correct Answer
A. Circumpharyngeal ConnectiveExplanation
The correct answer is Circumpharyngeal Connective. In earthworm anatomy, the circumpharyngeal connective is the structure that is numbered 21. This connective tissue surrounds the pharynx, which is the muscular tube responsible for swallowing food. It helps to connect and support the various muscles and nerves in the pharyngeal region of the earthworm.Rate this question:
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- 17.
What structure is number 22 for earthworm anatomy?
- A.
Circumpharyngeal Connective
- B.
Anterior Nerve Fibers
- C.
Cerebral Ganglion
- D.
Muscle Fibers
- E.
Pharynx
Correct Answer
B. Anterior Nerve FibersExplanation
The correct answer is "Anterior Nerve Fibers." In earthworm anatomy, the anterior nerve fibers refer to the nerve fibers located towards the front end of the worm. These nerve fibers are responsible for transmitting signals and information throughout the worm's body, allowing for sensory perception and coordination of movement.Rate this question:
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- 18.
What structure is number 23 for earthworm anatomy?
- A.
Circumpharyngeal Connective
- B.
Anterior Nerve Fibers
- C.
Cerebral Ganglion
- D.
Muscle Fibers
- E.
Pharynx
Correct Answer
C. Cerebral GanglionExplanation
The correct answer is Cerebral Ganglion. In earthworm anatomy, the cerebral ganglion is the main nerve center located in the anterior part of the worm's body. It acts as the brain of the earthworm, controlling its sensory and motor functions. The cerebral ganglion receives information from the sensory organs and sends out signals to coordinate the movement and behavior of the earthworm.Rate this question:
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- 19.
What structure is number 24 for earthworm anatomy?
- A.
Circumpharyngeal Connective
- B.
Anterior Nerve Fibers
- C.
Cerebral Ganglion
- D.
Muscle Fibers
- E.
Pharynx
Correct Answer
D. Muscle FibersExplanation
Muscle fibers are the structure number 24 for earthworm anatomy. Earthworms have a segmented body, and the muscles in their body walls allow them to move and burrow through the soil. These muscle fibers contract and relax, causing the earthworm to extend and retract its body segments, enabling it to crawl and dig.Rate this question:
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- 20.
What structure is number 25 for earthworm anatomy?
- A.
Circumpharyngeal Connective
- B.
Anterior Nerve Fibers
- C.
Cerebral Ganglion
- D.
Muscle Fibers
- E.
Pharynx
Correct Answer
E. PharynxExplanation
The pharynx is the correct answer because it is a structure found in the anatomy of an earthworm. The pharynx is a muscular tube located in the throat region of the earthworm and is responsible for the intake of food. It helps in the process of digestion by grinding and breaking down the food particles before they enter the esophagus. The other options, such as circumpharyngeal connective, anterior nerve fibers, cerebral ganglion, and muscle fibers, are not specifically related to the structure numbered 25 in earthworm anatomy.Rate this question:
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- 21.
What structure is number 31 for earthworm anatomy?
- A.
Subneural blood vessel
- B.
Nerve cord
- C.
Ovary
- D.
Oviduct
- E.
Ventral Blood Vessel
Correct Answer
A. Subneural blood vesselExplanation
The subneural blood vessel is the structure that is number 31 in earthworm anatomy. This blood vessel runs along the ventral side of the nerve cord, which is responsible for transmitting nerve signals throughout the body. The subneural blood vessel helps in the transportation of oxygen and nutrients to different parts of the earthworm's body, as well as the removal of waste products. It plays a crucial role in the circulatory system of the earthworm.Rate this question:
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- 22.
What structure is number 32 for earthworm anatomy?
- A.
Subneural bllod vessel
- B.
Nerve cord
- C.
Ovary
- D.
Oviduct
- E.
Ventral Blood Vessel
Correct Answer
B. Nerve cordExplanation
The nerve cord is the correct answer because it is the structure that is number 32 in earthworm anatomy. The nerve cord is a long, tube-like structure that runs along the ventral side of the earthworm and serves as the main pathway for transmitting nerve impulses throughout the body. It is responsible for coordinating the earthworm's movements and sensory responses.Rate this question:
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- 23.
What structure is number 33 for earthworm anatomy?
- A.
Subneural bllod vessel
- B.
Nerve cord
- C.
Ovary
- D.
Oviduct
- E.
Ventral Blood Vessel
Correct Answer
C. OvaryExplanation
The correct answer is Ovary. In earthworm anatomy, the ovary is the structure that functions in the reproduction of the earthworm. It is responsible for producing and storing the eggs.Rate this question:
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- 24.
What structure is number 34 for earthworm anatomy?
- A.
Subneural bllod vessel
- B.
Nerve cord
- C.
Ovary
- D.
Oviduct
- E.
Ventral Blood Vessel
Correct Answer
D. OviductExplanation
The oviduct is the structure number 34 in earthworm anatomy. The oviduct is a tube-like structure that connects the ovaries to the exterior of the earthworm's body. It is responsible for transporting the eggs from the ovaries to the exterior, where they can be fertilized. This structure plays a crucial role in the reproductive system of earthworms.Rate this question:
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- 25.
What structure is number 35 for earthworm anatomy?
- A.
Subneural blood vessel
- B.
Nerve cord
- C.
Ovary
- D.
Oviduct
- E.
Ventral Blood Vessel
Correct Answer
E. Ventral Blood VesselExplanation
The number 35 structure in earthworm anatomy is the ventral blood vessel. This is a major blood vessel located on the ventral side of the earthworm's body. It is responsible for carrying oxygenated blood from the heart to the rest of the body, as well as transporting deoxygenated blood back to the heart. The ventral blood vessel plays a crucial role in the circulatory system of the earthworm, ensuring the transportation of nutrients and waste products throughout its body.Rate this question:
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- 26.
What is number 36 for earthworm anatomy?
Correct Answer
cropExplanation
The crop is number 36 in earthworm anatomy. The crop is a thin-walled, expanded part of the digestive tract where food is temporarily stored before it moves into the gizzard for further digestion. It serves as a storage organ for the earthworm, allowing it to eat large amounts of food at once and then gradually digest it.Rate this question:
- 27.
What is number 37 for earthworm anatomy?
Correct Answer
dorsal blood vesselExplanation
The number 37 in earthworm anatomy refers to the dorsal blood vessel. This is a major blood vessel that runs along the dorsal side of the earthworm's body. It is responsible for carrying oxygenated blood from the front of the worm to the back, aiding in the circulation of nutrients and waste removal. The dorsal blood vessel plays a crucial role in the earthworm's overall physiology and is an important component of its circulatory system.Rate this question:
- 28.
What is number 38 for earthworm anatomy?
Correct Answer
dorsointestinal vesselExplanation
The number 38 in earthworm anatomy refers to the dorsointestinal vessel. This is a structure found in the digestive system of earthworms. It runs along the dorsal side of the worm's body and is responsible for transporting nutrients and waste materials. The dorsointestinal vessel plays a crucial role in the earthworm's digestion and excretion processes.Rate this question:
- 29.
What is number 39 for earthworm anatomy?
Correct Answer
gizzardExplanation
The gizzard is the 39th part of the earthworm's anatomy. The gizzard is a muscular organ found in the digestive system of earthworms that helps in grinding and breaking down food particles. It acts as a mechanical stomach, using strong muscles and small stones or grit to grind the food before it enters the intestine for further digestion and absorption. The gizzard plays a crucial role in the earthworm's digestion process, making it an important part of its anatomy.Rate this question:
- 30.
Number 40 for earthworm anatomy is the nephridium.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because the nephridium is indeed a part of the earthworm anatomy. Nephridia are excretory organs found in many invertebrates, including earthworms. They function to filter waste products from the coelomic fluid and eliminate them from the body. Therefore, it is accurate to say that number 40 in earthworm anatomy refers to the nephridium.Rate this question:
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- 31.
Number 41 for earthworm anatomy is the intestine
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because the intestine is indeed a part of the anatomy of an earthworm. The intestine is responsible for the digestion and absorption of nutrients in the earthworm's body. It is a long, tubular organ that extends from the crop to the anus.Rate this question:
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- 32.
Number 40 for earthworm anatomy is the anus.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement is false because the correct answer for number 40 in earthworm anatomy is not the anus.Rate this question:
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- 33.
What is the structure for number 43 in earthworm anatomy?
Correct Answer
clitellumExplanation
The clitellum is a structure found in the anatomy of an earthworm. It is a swollen, saddle-like segment located near the anterior end of the worm's body. The clitellum plays a crucial role in reproduction, as it secretes a mucus ring that collects eggs and sperm during mating. This structure is unique to earthworms and is not found in other organisms.Rate this question:
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