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Question
What is meant by the term 'double circulation' of blood in mammals? What is diastole?
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Solution
Blood flows twice in the heart before it completes one full cycle. This process of blood circulation in the human body is called double circulation.
The expansion or relaxation phase of the atria is called a diastole.
RELATED QUESTIONS
The diagram below represents the human heart in one phase of its function. Study the diagram carefully and answer the questions that follow:
(i) Name the phase.
(ii) Which part of the heart is contracting in this phase? Give a reason to support your answer.
(iii) Name the parts labelled 1 to 4.
(iv) What type of blood flows through ‘2’?
(v) State the function of the part numbered ‘5’.
(vi) Name the membrane that covers the heart.
Give appropriate biological or technical terms for the following
The relaxation phase of the heart.
State the functions of blood in our body.
MULTIPLE CHOICE TYPE:
(Select the most appropriate option)
The valve present between the right atrium and the right ventricle is the
(a) tricuspid valve
(b) bicuspid valve
(c) semi-lunar valve
(d) mitral valve
Name the following:
The valve present in between the chambers on the right side of the human heart.
what is Venule?
Put a tick mark (✓) against the correct alternative in the following statement.
The blood tastes saltish due to the dissolved.
Fill in the blanks with suitable words given below:
The carbon dioxide loaded blood from right ventricle is pumped into the lungs through ______.
Explain the Term
Hepatic Portal System
The lymphatic system consists of which of the following?
