Human Body Systems , Life Cycles And Reproduction - Fourth Grade | Attempts: 165

2.

The following can be said about the diaphragm

It is part of the reproductive system
It works in conjuction with the lungs to let air in and out.
Is an organ from the excretory system.
It is part of the circulatory system.
It is part of the nervous system.

Correct Answer

A. It works in conjuction with the lungs to let air in and out.

Explanation

The diaphragm is a dome-shaped muscle located below the lungs. It plays a crucial role in the respiratory system by contracting and relaxing to facilitate breathing. When it contracts, it moves downward, creating more space in the chest cavity and allowing the lungs to expand. This expansion draws air into the lungs. Conversely, when the diaphragm relaxes, it moves upward, compressing the lungs and forcing air out. Therefore, the diaphragm works in conjunction with the lungs to let air in and out, making the given answer correct.

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3.

The function of the Respiratory System is

To bring carbon dioxide to the cells of the body and remove oxygen.
To remove solid waste from the body.
To bring oxygen into body, remove waste gases out of body.
Options A and B are correct.
To remove liquid wastes from the body.

Correct Answer

A. To bring oxygen into body, remove waste gases out of body.

Explanation

The function of the Respiratory System is to bring oxygen into the body and remove waste gases out of the body. This system is responsible for the process of respiration, where oxygen is taken in from the air we breathe and transported to the cells of the body. At the same time, waste gases such as carbon dioxide are removed from the body through exhalation. This exchange of gases is essential for the body's cells to function properly and maintain homeostasis. Options A and B are incorrect as they do not accurately describe the primary function of the respiratory system.

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4.

The difference between open and closed circulatory systems is

Open circulatory systems have blood vessels whereas closed circulatory systems don't.
Open circulatory systems have only arteries.
Open circulatory systems don't have any blood vessels whereas closed circulatory systems have veins and arteries.
Open circulatory systems have only veins.
Open circulatory systems are common among vertebrates whereas closed circulatory systems are common among invertebrates.

Correct Answer

A. Open circulatory systems don't have any blood vessels whereas closed circulatory systems have veins and arteries.

Explanation

The correct answer is that open circulatory systems don't have any blood vessels whereas closed circulatory systems have veins and arteries. This is because in open circulatory systems, the circulatory fluid (hemolymph) is pumped into a body cavity called the hemocoel and directly bathes the organs and tissues. There are no distinct blood vessels to transport the hemolymph. In contrast, closed circulatory systems have a network of blood vessels that carry the blood, which is pumped by a heart, to different parts of the body. Veins carry deoxygenated blood back to the heart, while arteries carry oxygenated blood away from the heart.

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5.

What is the organ that controls all other organs and systems.

The heart.
The nerves.
The eyes.
The lungs.
The brain.

Correct Answer

A. The brain.

Explanation

The brain is the organ that controls all other organs and systems in the body. It is responsible for processing information, making decisions, and sending signals to different parts of the body. Through its complex network of nerves, the brain regulates bodily functions, such as breathing, digestion, and movement. It also plays a crucial role in cognitive processes, emotions, and memory. The brain is often referred to as the command center of the body, as it coordinates and controls all other organs and systems to maintain overall functioning and homeostasis.

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6.

The organ system that removes liquid wastes is called the

Respiratory System
Digestive System.
Muscular System.
Excretory system
The Nervous System

Correct Answer

A. Excretory system

Explanation

The excretory system is responsible for removing liquid wastes from the body. This system includes organs such as the kidneys, bladder, and urethra, which filter waste products from the blood and eliminate them through urine. The respiratory system is responsible for gas exchange, not waste removal. The digestive system processes food and absorbs nutrients, but does not primarily remove liquid waste. The muscular system is responsible for movement and does not directly remove waste. The nervous system controls and coordinates body functions, but does not have a specific role in waste removal. Therefore, the correct answer is the excretory system.

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7.

The stages of an animal's growth and change are part of its

Life Span
Life style
Life cycle
Instinct
Camouflage

Correct Answer

A. Life cycle

Explanation

The stages of an animal's growth and change refer to its life cycle. The life cycle includes various phases such as birth, growth, reproduction, and death. It encompasses the entire process of development and maturation that an animal goes through from one generation to the next. This term is commonly used to describe the sequence of events and transformations that occur in an organism's life, highlighting the continuous cycle of life and the interconnectedness of different stages.

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8.

Organisms use ______to blend with their surroundings.

Wings
Adaptation
Camouflage
Brain
Lungs

Correct Answer

A. Camouflage

Explanation

Organisms use camouflage to blend with their surroundings. Camouflage is a form of adaptation that allows organisms to hide or blend in with their environment, making them less visible to predators or prey. This can involve coloration, patterns, or physical structures that help the organism to blend in with their surroundings, making it more difficult for other organisms to detect them. Wings, brain, and lungs are not directly related to blending with the surroundings, so they are not the correct answer in this context.

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9.

The liquid waste of the body..

Is called the bili and is excreted by the rectum
Is called urine goes from the kidneys down the ureter to be stored in the bladder
Is discarded by the nervous system
Is a result of toxins and waste chemicals absorbed by the kidneys to be taken out of the body.
Answers B and D.

Correct Answer

A. Answers B and D.

Explanation

The liquid waste of the body is called urine, which is excreted by the kidneys. It goes from the kidneys down the ureter to be stored in the bladder. Urine is a result of toxins and waste chemicals absorbed by the kidneys to be taken out of the body. Therefore, both answer B and D are correct as they both describe the process of urine formation and excretion.

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10.

Fertilization is the process by which

An egg and a sperm unite to form an embryo.
A cell divides in two parts.
A kind of regeneration
A sperm becomes an embryo.
An egg becomes an embryo.

Correct Answer

A. An egg and a sperm unite to form an embryo.

Explanation

Fertilization is the process by which an egg and a sperm unite to form an embryo. During fertilization, the sperm penetrates the egg and their genetic material combines, resulting in the formation of a zygote. This zygote then undergoes cell division and development to eventually form an embryo. This process is essential for sexual reproduction in many organisms, including humans.

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11.

Suppose you could shrink to microscopic size and take a tour of one of your body systems. Which system would you choose and why. Describe your tour using drawings if you like to illustrate what you see in your tour. Use complete sentences, good spelling and punctuation.

Human Body Systems , Life Cycles And Reproduction - Fourth Grade

The function of the Circulatory System is

Quiz Preview

The following can be said about the diaphragm

The function of the Respiratory System is

The difference between open and closed circulatory systems is

What is the organ that controls all other organs and systems.

The organ system that removes liquid wastes is called the

The stages of an animal's growth and change are part of its

Organisms use ______to blend with their surroundings.

The liquid waste of the body..

Fertilization is the process by which

Suppose you could shrink to microscopic size and take a tour of one of your body systems. Which system would you choose and why. Describe your tour using drawings if you like to illustrate what you see in your tour. Use complete sentences, good spelling and punctuation.