The heart, blood, and blood vessels combine to form which of the following?
A) a group of cells
B) an organ system
C) the smallest level of organization
D) an organ
E) an individual living entity
B) an organ system
You might also like to view...
The spleen
A. filters damaged red blood cells from the blood. B. changes undifferentiated lymphocytes into competent lymphocytes. C. is necessary for life. It can't be removed without causing death. D. produces several different hormones with unknown function. E. has additional digestive functions.
Microfilaments and microtubules are part of the cytoskeleton.
Answer the following statement true (T) or false (F)
Describe or diagram the basic pattern of a biological signal transduction pathway.
What will be an ideal response?
List 4 reasons a cat may refuse to use its litter box
What will be an ideal response?