Advertisements
Advertisements
प्रश्न
Long answer question:
Describe the histological structure of the artery, vein, and capillary.
Advertisements
उत्तर
The three structural layers of a generalized blood vessel from innermost to outermost are the tunica interna (intima), tunica media, and tunica externa. Modifications in this basic design account for the five types of blood vessels and the structural and functional differences among the various vessel types. In the transverse section of an artery, three layers can be seen. They are:
T. S. of Artery, Vein and Capillary-
1. Tunica externa or tunica adventitia:
It is a thick, tough layer of collagen fibers.
2. Tunica media:
It is the middle layer made up of smooth muscle fibers and a network of elastic fibers. This thick muscular and elastic layer makes the arterial wall pulsatile.
3. Tunica interna or intima:
The innermost tunica interna is a single layer of flat compact endothelial cells surrounding the lumen. The angular margin around the lumen shows tessellations. Arterial lumen is devoid of valves and blood flows through it rapidly and with high pressure.
APPEARS IN
संबंधित प्रश्न
Why is a person having blood group AB called universal recipient and a person with blood group O called a universal donor?
Find the odd one out, giving reason:
RBC, platelets, anti-A, WBC
The following simplified diagram refers to the outline plan of the circulation of blood in a mammal. Study the diagram and write the number and the name of the blood vessel in each case as mentioned ahead.
Several hours after a meal containing a lot of protein, which vessel will contain the highest concentration of urea?
Given below is a diagrammatic representation of certain types of blood vessels in human body.
Where can such an arrangement be found as an example - in lungs or in heart walls?
The figures given below are cross-sections of blood vessels.
(i) Identify the blood vessels A, B, and C.
(ii) Name the parts labeled 1-4.
(iii) Mention two structural differences between A and B.
(iv) Name the type of blood A that flows (a) through A, (b) through B.
(v) In which of the above vessels referred to in (iv) above does exchange of gases actually take place?
Complete the following sentence with appropriate word:
__________ are the blood vessels which usually carry oxygenated blood.
Complete the following sentence with appropriate word:
The blood vessel which transports blood from heart to an organ is called _________.
Long answer question:
Which blood vessel of the heart will have the maximum content of oxygen and why?
At the venous end of the capillary bed, the osmotic pressure is ______.
Walls of capillaries consist of a single layer of squamous ______ cells.
