Advertisements
Advertisements
Question
Describe pericardium.
Advertisements
Solution
- The heart is enclosed in a membranous sac called the pericardium.
- The pericardium is formed of two main layers - outer fibrous and inner serous pericardium.
- Serous pericardium is soft, moist, and elastic. It is formed of squamous epithelium and is further divisible into two layers as a parietal and visceral layer.
- Parietal and visceral layers of serous pericardium are separated by a pericardial space.
- This space is filled with pericardial fluid (about 50ml) which acts as a shock absorber and protects the heart from mechanical injuries.
- It also keeps the heart moist and acts as a lubricant.
APPEARS IN
RELATED QUESTIONS
Foetus : Amnion : : Heart: ______
When are the sounds ‘LUBB’ and ‘DUB’ produced during heartbeat ?
Given alongside is a highly diagrammatic sketch of the internal structure of the human heart:
(i) Name the parts numbered 1-11.
(ii) What is the main difference in the quality of blood contained in parts 6 and 7?
The diagram given below represents the human heart in one phase of its activity. Study the same and then answer the questions that follow:
 |
- Name the phase.
- Which part of the heart is contracting in this phase? Give a reason to support your answer.
- Name the parts numbered 1to6.
- What type of blood flows through the parts marked 'l' and '2' respectively?
- How many valves are closed in this phase?
Name the Following
The study of blood vascular system including arteries, veins and heart.
Complete the following sentence with appropriate word:
The ______ is the most powerful organ in the circulatory system.
The number of chambers in human heart are _______
‘Heart of heart’ is called ______
Describe the structure and working of the human heart.
____________ branches from bundle of His and forms a network in ventricular walls.
