Question

Introduction:
Cardiovascular system includes hea
tem includes heart and blood vessels. Heart pum
cel Blood vessels circulate the blood throughout the
te and oxygen to the tissues and removes carbon
transports nutrients and oxygen to th
waste products from the tissues.
HEART
Definition: The chambered muscular organ in vertebrates that our
ed from the veins into the Arteries, thereby maintaining th
through the entire circulatory system.
Shape: conical
Color: Reddish brown
Size: 12 cm long and 9 cm broad.
Weight: 300 gm in males and 250 gm in females
Position: It lies in mediastinal space of thoracic cavity between
STURCTURE OF THE HEART
(A) External features of the heart:
(1) PERICARDIUM: The heart is enclosed in a sac like structu
pericardium, the pericardium have two functions.
• It allow frictionless movements of the heart and.
• It protects the heart from mechanical shocks.
(2) APEX: The heart has an apex directed downward forward a
left intercostal space)
(3) BASE: The base of left is attached to several large blood v
beneath the 2nd rib.
Arch of aorta
Ascending sorta
Descending
aorta
Superior
Ligamentum
arteriosum
Aundle of​

Answer 1

Answer:

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