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

Detection of pulmonary hypertension, Pressure calculation made using the Be...

Pressure calculation made using the Bernoulli equation may be used  in conjunction with pressure measurements made by other modalities to determine various intracardiac pressure.

Mitochondrial membrane, Fatty acid breakdown happens in the cytosol of prok...

Fatty acid breakdown happens in the cytosol of prokaryotes in plants in peroxisomes and in the mitochondrial matrix of all other eukaryotes.  By entering the mitochondrial matrix,

What is rh typing of mother & fetus hemolythemolytic disease, What is the R...

What is the Rh typing of the mother and of the fetus in the hemolytic disease of the newborn? In a hemolytic disease of the newborn the mother is Rh- and the fetus Rh+. In thes

How to draw the cell in metaphase, Start with a cell with chromosome number...

Start with a cell with chromosome number 2n=6, and having two acrocentric pairs and one metacentric pair of chromosomes. Draw the cell in metaphase I. Indicate one pair of sister c

What are the types of cell respiration, What are the types of cell respirat...

What are the types of cell respiration? There are two types of cell respiration: aerobic cell respiration, a reaction with participation of molecular oxygen (O2), and anaerobic

Why is the krebs cycle also called the final common pathway, Why is the Kre...

Why is the Krebs cycle also called the final common pathway of the degradation of organic compounds? The Krebs cycle is known as the final common pathway of the degradation of

Explain the population growth of ecology, Explain the Population Growth? ...

Explain the Population Growth? A population can grow, it can remain stable, or it can decrease in size. Measuring the size of a population over time is used to help determine t

Explain about rna molecules, Explain how early RNA molecules might have bee...

Explain how early RNA molecules might have been able to respond to natural selection. Every RNA molecule might have competed with slightly dissimilar RNA molecules for nucleoti

How poor selection of food causing the underweight, How Poor Selection of F...

How Poor Selection of Food causing the Underweight? Poor Selection of Food: Poor selection of food along with irregular eating habits may be responsible for insufficient food

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