Evolution of heart in higher animals, Biology

Assignment Help:
Evolution of heart in higher animals
  1. The circulatory system in higher animals has undergone several changes during evolution.
  2. The heart has become totally muscular.
  3. The heart has two chambers in fishes - one auricle and one ventricle. It is a branchial heart.
  4. In amphibians like frog the heart is made up of three chambers 
  5. It has two auricles and one ventricle.
  6. In reptiles like lizards, the ventricle is incompletely divided.
  7. So, it is an incompletely divided four chambered heart.
  8. In birds and mammals, the heart is completely divided into four chambers with two auricles and two ventricles. It is a pulmonary heart.

Related Discussions:- Evolution of heart in higher animals

Bacteria and archaea been placed in a seperate domain, Why have bacteria an...

Why have bacteria and archaea been placed in a seperate domain?

Metastasis - characteristics define cancer, Metastasis - Characteristics De...

Metastasis - Characteristics Define Cancer Metastasis is the capability of a malignant cell to detach itself from a tumor and establish a tumor in another site. This capabilit

State the term - neuroanatomists broadmann, State the term - Neuroanatomist...

State the term - Neuroanatomists Broadmann Neuroanatomists Broadmann used a combination of staining and microscopy to map the cytoarcitecture (cell structure\type) of human ce

Phlum arthropoda, how to write a project on phylum arthropoda

how to write a project on phylum arthropoda

Explain the anabolic phase - dietary management for burns, Explain the Anab...

Explain the Anabolic Phase - Dietary Management for Burns? During this period the patient is well hydrated and the reactions due to metabolic stress are under control. The pati

How are triglycerides made, How are triglycerides made? Triglycerides, ...

How are triglycerides made? Triglycerides, fats or oils, are made of three molecules of fatty acids bound to single molecule of glycerol. Hydroxyls of each one of the three fat

What is the difference between aerobic and anaerobic beings, What is the di...

What is the difference between aerobic and anaerobic beings? Aerobic organisms are those whose cells do not survive without oxygen as they depend on aerobic cell respiration to

Dna, diagram of dna replication

diagram of dna replication

Pharmacological management, Once the decision to start drug treatment of hy...

Once the decision to start drug treatment of hypertension is made, the aim should be to provide 24 hour BP control, with agents that would encourage patient adherence. The patient

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