Circulatory System
Circulatory System: Overview
This topic covers concepts, such as, Relationship between Heartbeat and Pulse Rate, Transportation in Sponges, Type of Blood cells & Pulse etc.
Important Questions on Circulatory System
Diastole is the contraction phase of the heart muscle.
The period of contraction of heart chambers is called
Explain the importance of contraction of heart muscle.
Nitrogenous waste urea is excreted out in the form of _____ in Hydra.
Name the following:
Organism that do not have circulatory system.
How transportation took place in Hydra.
The relaxation phase of the heart is called:
During the relaxation of the heart muscle, blood from veins flows into _____. (atria/ aorta)
What happens during the relaxation phase of the heart muscle?
Relaxation allows the blood to fill in the heart.
Heartbeat occurs due to contraction and _____ (relaxation/sleeping) of the heart.
Hydra excrete nitrogenous waste through:
Hydra has circulatory system.
Why do you think pulse rate increases while running? Measure your pulse rate when you have fever. Why does it increase?
Find out how oxygen and digested food reach the body cells?
Complete the following table.
| S.No | Parts | Function |
| 1. | Heart | |
| 2. | Blood vessels | |
| 3. | Blood |
What is the circulatory system?
Why is the blood called oxygenated and deoxygenated?
Put your ear on the chest of your friend and listen. You will hear some sound. Which system makes the sound lub-dub?
