MT CHAPTER 2 BODY STRUCTURE AND DIRECTIONAL TERMINOLOGY

HUMAN BODY SY STEMS OR

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Cell Membrane
Thin outer wall that encloses the cell contents
Cytoplasm
Holds the organelles of the cell
Lysosome
Organelle that serves a digestive function for the cell
Ribosome
Site of protein formation; contains RNA
Mitochondrion
Converts netrients to energy in presence of oxygen
Nucleus
Control center of cell; contains DNA, which carries genetic information
Antrum
Any nearly closed cavity or chamber
Apex
The pointed extremith of a conical structure such as the heart
Body
The largest or most important part of an organ
Fornix
Any vaultlike or arched body
Fundus
Base or deeptes part of a hollow organ that is farthest from the mouth of the organ
Hilum
Recess, exit, or entrance of a duct into a gland or of nerves and vessels into an organ
Lumen
Space within an artery, vein, intestine, or tube
Sinus
Cavity or channel in bone, a dilated channel for blood, or cavity to permjit the escape of purulent material
Vestibule
Small space or cavity at the beginning of a canal