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Circulatory system :

Closed & single circulation is present in frog.

Function of circulatory system is to transport food, gases and hormones to various parts of the body. It consists
of following structures 

Heart :

Circulatory System: Frog | Additional Study Material for NEET

Three chambered, muscular myogenic heart is present in it which have 2 Auricles & 1 ventricle. Auricles receive the blood. Ventricle pumps the blood to the various parts of the body

Its heart rate is 64/min.

mice – 400-600/min

elephant – 25-28/min

tortoise – 8/min

Blue whale has the largest heart

Blood vessel : These are contractile tubes which distribute blood from the heart to the various parts of the body.

Blood : Three type of blood cells are present in it
(1) RBC – RBC are oval or biconvex in shape and nucleated. It contains haemoglobin which carry the oxygen.

(2) WBC – This cell provide protection or immunity.

(3) Thrombocytes : This cell prevent loss of blood by forming thrombus or clots on the bleeding site.

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FAQs on Circulatory System: Frog - Additional Study Material for NEET

1. What is the circulatory system of a frog?
Ans. The circulatory system of a frog is a complex network of blood vessels, the heart, and other organs that work together to transport oxygen, nutrients, hormones, and waste products throughout the frog's body.
2. How many chambers does a frog's heart have?
Ans. A frog's heart has three chambers: two atria and one ventricle. The atria receive oxygenated blood from the lungs and deoxygenated blood from the body, while the ventricle pumps the blood out to the body.
3. How does blood flow through the circulatory system of a frog?
Ans. In a frog, blood flows through the circulatory system in a double circulation pattern. Oxygenated blood from the lungs enters the left atrium, then the ventricle, which pumps it out to the body. Deoxygenated blood from the body enters the right atrium, then the ventricle, which pumps it to the lungs for oxygenation.
4. What is the role of blood vessels in the frog's circulatory system?
Ans. Blood vessels in a frog's circulatory system play a crucial role in transporting blood throughout the body. Arteries carry oxygenated blood away from the heart, while veins carry deoxygenated blood back to the heart. Capillaries are tiny blood vessels where exchange of nutrients, gases, and waste products occurs between the blood and body tissues.
5. How does the circulatory system of a frog support its survival?
Ans. The circulatory system of a frog supports its survival by ensuring the delivery of oxygen and nutrients to its cells and the removal of waste products. It helps maintain homeostasis by regulating body temperature and pH levels. Additionally, the circulatory system plays a crucial role in the immune response, as it transports white blood cells to fight against infections and diseases.
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