Portage Learning A&P 2
Module 2 2026 Exam Questions
and Correct Answers | New
Update
List the two systems within the human circulatory system and their
functions. - ANSWER ✔✔The human circulatory system contains the
cardiovascular system and the lymphatic system. The cardiovascular
system functions to transport gases, nutrients, and wastes throughout
the body, prevent loss of blood from ruptured vessels, and fight invasion
of the body by foreign bodies. The lymphatic system has three main
functions: lymphatic vessels take up excess tissue fluid and return it to
, the bloodstream; lymphatic capillaries absorb fats and transport them to
the bloodstream; and the lymphatic system helps to defend the body
against disease.
List and describe the different types of vessels within the human
cardiovascular system. - ANSWER ✔✔Arteries are elastic, thick-
walled vessels which are capable of expanding to accommodate the
larger blood volume flowing from the heart at the end of each heartbeat.
Small arteries called arterioles are constricted and dilated by muscles
controlled by the nervous system which increases or decreases the
blood pressure respectively. The branching of arterioles causes
formation of even narrower tubes called capillaries which are
interconnected to form capillary beds which perform the exchange of
materials with the cells of the body. The blood is collected from the
capillary beds by small veins called venules many of which join to form a
vein which returns the blood to the heart. Veins are thinner-walled
vessels with internal valves which open toward the heart and close at
the end of a heart beat to prevent blood from flowing backward.
Describe the human heart. - ANSWER ✔✔The heart is a fist-sized
cone-shaped muscular organ located between the lungs. The bulk of the
heart, called the myocardium, composed mainly of cardiac muscle is the
layer that actually contracts. The myocardium muscle fibers are highly
Module 2 2026 Exam Questions
and Correct Answers | New
Update
List the two systems within the human circulatory system and their
functions. - ANSWER ✔✔The human circulatory system contains the
cardiovascular system and the lymphatic system. The cardiovascular
system functions to transport gases, nutrients, and wastes throughout
the body, prevent loss of blood from ruptured vessels, and fight invasion
of the body by foreign bodies. The lymphatic system has three main
functions: lymphatic vessels take up excess tissue fluid and return it to
, the bloodstream; lymphatic capillaries absorb fats and transport them to
the bloodstream; and the lymphatic system helps to defend the body
against disease.
List and describe the different types of vessels within the human
cardiovascular system. - ANSWER ✔✔Arteries are elastic, thick-
walled vessels which are capable of expanding to accommodate the
larger blood volume flowing from the heart at the end of each heartbeat.
Small arteries called arterioles are constricted and dilated by muscles
controlled by the nervous system which increases or decreases the
blood pressure respectively. The branching of arterioles causes
formation of even narrower tubes called capillaries which are
interconnected to form capillary beds which perform the exchange of
materials with the cells of the body. The blood is collected from the
capillary beds by small veins called venules many of which join to form a
vein which returns the blood to the heart. Veins are thinner-walled
vessels with internal valves which open toward the heart and close at
the end of a heart beat to prevent blood from flowing backward.
Describe the human heart. - ANSWER ✔✔The heart is a fist-sized
cone-shaped muscular organ located between the lungs. The bulk of the
heart, called the myocardium, composed mainly of cardiac muscle is the
layer that actually contracts. The myocardium muscle fibers are highly
