Human or mammalian heart, Biology

HUMAN HEART (MAMMALIAN HEART) -

Position - Situated in thoracic cavity in pericardial cavity close to its front wall. Its broad base faces upward and backward. Its narrow apex faces downward, forward & slightly to the left side and rests on diaphragm.

Shape - Some conical.

Colour - Dark red.

Chamber - 4 (2 auricles & 2 ventricles)

Size - Roughy 12 x 9 cms.

Weight - Average wt. is about 300 gm. in male, 250 gm in female.

Covering - Covered by 2 pericardium. Inner serous pericardium consists of outer parital layer and inner visceral layer.

Outer fibrous pericardium is made up of white fibres.Between these two pericardial fluid (secreted by serous pericardium) present keeps the heart moist, allows it free movement, reduces friction & protect from external shocks.

Protective Cage - Sternum and ribs form protective cage.

Wall of Heart - In it three layers present. Epicardium, myocardium and endocardium. Epicardium is outer layer made up of squamous epithelium. (Mesothelium). Myocardium is made up of cardiac muscles. Endocardium consists of endothelial layer resting as a thin layer of loose connective tissue.

Posted Date: 10/2/2012 12:56:45 AM | Location : United States







Related Discussions:- Human or mammalian heart, Assignment Help, Ask Question on Human or mammalian heart, Get Answer, Expert's Help, Human or mammalian heart Discussions

Write discussion on Human or mammalian heart
Your posts are moderated
Related Questions
assignment help on radiation pollution

What is Calvin Cycle? The dark reactions of photosynthesis are also known as the Calvin cycle. This process synthesizes glucose molecules using carbon dioxide from the atmosphe

why roots grow downword

Which of the following pairs of events in a human female occur at, or nearly at, the similar time during the menstrual cycle? A. High blood plasma LH levels and ovulation. B

Double fertilization  It carries two sperm cells to the female. A characteristic of angiosperms in which the pollen tube gametophyte in the ovule. The one sperm cell fuses with the


Calculate the diffusion coefficient of a protein bovine serum albumin at 23 degree Celsius?

what is hybridization,and what are its different types??

Which are the plant tissues that cover the stem and the leaves? The stem may be enclosed by epidermis (having stomata, cuticle and photosynthetic cells) as in monocots or, alte