Circulation and Respiration

All of your organ systems function because of the contributions of organs, tissues, and _________.

• cells
• blood vessels
• heart
• lungs

This system transports blood throughout the body, delivers essential substances to cells and removes wastes.

• circulatory system
• respiratory system
• digestive system
• muscular system

The circulatory system is also known as....

• all possible multiple choice answers
• cardiovascular system
• respiratory system
• digestive system

The cardiovascular system consists of ___________.

• blood vessels
• heart
• blood
• all possible multiple choice answers

The _____________ of the heart collects oxygen-poor blood from the body and pumps

• right side
• left side
• middle
• bottom

The ___________ of the heart collects oxygen-rich blood from the lungs and pumps it to the body so that every cell in the body has the oxygen it needs.

• left side
• right side
• middle
• bottom

A __________ is a flap of tissue that prevents the backflow of blood. When each chamber contracts, the valve at its exit.

• valve
• septum
• ventricle
• aorta

The heart has how many chambers?

• one
• two
• three
• four

Arties with the exception of the pulmonary artery, carry ______________.

• blood high in oxygen back to the heart
• blood low in oxygen back to the heart 
• blood high in oxygen away from the heart
• blood low in oxygen away from the heart

_______________ carry blood away from the heart.

• veins
• arteries
• capillaries
• none of the possible answers