Blood moves forward through veins because of all of the following except
A) the pressure in the veins is lower than in the arteries.
B) pumping by the smooth muscle in the wall of the vein.
C) the respiratory pump.
D) valves in the veins preventing the backward flow of blood.
E) muscular compression.
Question 2
Which of the following descriptions best matches the term endometrium?
A) thick layer of smooth muscle cells
B) supports the uterus anteriorly
C) supports the uterus laterally
D) consists of a functional zone and a basilar zone of epithelium
E) After ovulation, the ovum is captured by it.
Mosquito drinking blood
Blood Typing
Sickled and normal red blood cells.
Predators adapt to extreme water pressure and the absence of light
Red Blood Cells
A 31.1-g sample of Ne gas exerts a certain pressure in a container of fixed volume. What mass ...