For the circulation of blood throughout the body, it requires a system called……
a) blood circulatory system
b) lymphatic system
c) cardiovascular system
d) both a and c
Explanation: this system consist of heart and blood vessels
Heart is covered by a tough double membrane called……..
a) pleura
b) meninges
c) pericardium
d) renal capsule
Explanation: in Greek ‘cardium’ means heart
Heart consists of ……..chambers.
a) two
b) three
c) four
d) five
Explanation: two auricles (atria) and two ventricles
Relatively weaker
chamber of human heart is…….
a) ventricles
b) atria
c) sinus venosis
d) both a and b
Which of the following muscles are untiring and work nonstop?
a) smooth
b) skeletal
c) cardiac
d) bicep and tricep
Which of the following is/are the function/s of valve in blood circulatory system?
a) control blood flow
b) allow one way flow
c) screen the blood
d) both a and b
