Types of blood vessel, Biology

Assignment Help:

Types of Blood Vessel

Arteries

Arteries carry blood away form the heart via the pulmonary artery and aorta.

Arterioles

As major arteries begin to branch , they become smaller and capable of distkntion of constriction because of their muscle layer. These arterioles control the amount- of blood flow that will be delivered to the capillary bed.
The precapilliary sphincters that lie immediately proximal to the capillary bed control the capillary filling and shunting. They can increase central blood volume by constriction or increase the peripheral blood supply by dilatation.

Capillaries

These are very small vessels providing almost 60,000 miles of vascular tubules and composed almost exclusively of endothelial cells, thereby facilitating the passage of nutrients, plasma, oxygen and waste products across their membrane.
They are extensive in organs with high metabolic demands.

Veins

Blood form capillaries travels through small veins called venules ( which become larger as they approach the heart, derminating in the two largest veins-the superior and the inferior vena cavae. Veins have a thicker adventitia but
a much thinner middle muscle layer. Veins contain valves that promote blood flow to the heart against the forces of body and gravity.


Related Discussions:- Types of blood vessel

Early pre-operative care of cardiac surgical patient, Early Pre-operative C...

Early Pre-operative Care   1. Admission of patient-usual admission procedure to be completed. 2. Assessment of the patient. 3. History 4. Physical examination

Composition of body fluids, Composition of Body Fluids All body fluids...

Composition of Body Fluids All body fluids - plasma, interstitial and intracellular have one common feature i.e. they are formed mostly of water. You would be amazed to know t

Define traditional cycle of root canal treatment, Define Traditional Cycle ...

Define Traditional Cycle of Root Canal Treatment The traditional cycle of Root Canal Treatment a) Dig in the tooth to make a big hole b) Then, look through this hole to f

Define types of root canal perforations according to causes, Define Types o...

Define Types of Root Canal Perforations According To Causes Iatrogenic causes. Pathological causes.

Show germ layer from which the coeloms originate, Q. What is the germ layer...

Q. What is the germ layer from which the coeloms originate? The coeloms are deriving from mesoderm.

Person''s red blood cell content of 2, How would carbon monoxide poisoning ...

How would carbon monoxide poisoning affect a person's coloring, particularly of the mucous membranes? How would it affect the hemoglobin concentration, hematocrit, and percent oxyh

What is polymerase chain reaction, Which of the following is a false statem...

Which of the following is a false statement regarding Polymerase Chain Reaction (PCR)? A. PCR is a modified version of cellular replication that is used to amplify small amount

In how many parts hydrocolloids be classified, In how many parts Classifica...

In how many parts Classification of Hydrocolloids Hydrocolloids, based on their solubility, thickening and gelling properties in water, are categorized into two main classes.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd