Old red blood cells are removed from the blood by macrophages in what organ?

A) kidney
B) spleen
C) thymus
D) bone marrow
E) pancreas


Ans: B) spleen

Anatomy & Physiology

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Which extraembryonic structure is created as migrating mesodermal cells form a layer beneath the trophoblast, separating it from the blastocoele?

A) amnion B) placenta C) allantois D) yolk sac E) chorion

Anatomy & Physiology

The pelvic area is supplied with blood from the ________ arteries.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology

Blood from the lower limbs, the pelvis, and the lower abdomen is delivered to the __________.

a. hepatic portal system b. common saphenous veins c. hepatic veins d. external iliac veins

Anatomy & Physiology