Class - 7th
Subject - Science (Biology)
Chapter- Transportation of materials
Board- CBSE
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1.Name the following.
(a)The transport system in animals - _______
(b) Components of circulatory system - ________
(c) Organ in the body with pumps blood - _______
(d) The channels in which blood flows - ________
(e) The blood vessels that take blood away from the heart♥️ - _______
(f) The blood vessels that bring blood towards the heart♥️- _______
(g) Liquid part of blood- ______
(h) Different types of cells present in the blood - _______
(i) Red pigment present in the Red blood cells - ______
(j) The blood cell which help in clotting of blood- _______
(k) The process by which waste products are removed in single- celled organisms- ______
(l) Organs of excretory system in humans - _________
2. Define the following.
(a) Circulatory system-
(b) Heartbeat-
(c) pulse-
(d) Excretion-
(e) Excretory system-
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Answer:
1)
a-circulatory system.
b-heart. blood vessels. blood.
c-Heart.
d-transmunal channels.
e-arteries.
f-Veins.
g-plasma.
h-RBCs, WBCs, and platelets.
i-Hemoglobin.
j-Platelets.
k-diffusion.
l-sweat glands, the liver, the lungs and the kidney system.
2)
a)The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.
b)Heartbeat is defined as the pulse of your heart, or a single short moment, or something that acts as a unifying force. When your heart pulses and pumps blood throughout your body, this is an example of a heartbeat.
c)The rhythmic dilation of an artery that results from beating of the heart. Pulse is often measured by feeling the arteries of the wrist or neck.
d)to separate and eliminate from an organic body; separate and expel from the blood or tissues, as waste or harmful matter.
e)The excretory system is the system of an organism's body that performs the function of excretion, the bodily process of discharging wastes. The Excretory system is responsible for the elimination of wastes produced by homeostasis.
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