The mammalian heart is composed of two auricles and two ventricles.
The atrium have thin muscular wall and receive blood to the heart from the veins.They form the upper chambers and these chambers have small volumes as compared to the ventricles.
The right auricle receive deoxygenated blood from body organs except the lungs.The left auricle receive oxygenated blood from the lungs through the pulmonary vein.
Ventricles are the lower chambers, they are composed of thick cardiac muscle.The left ventricle has thicker muscular walls than right ventricle and smaller volume.
The two ventricles are separated by an intraventricular septum.The role of ventricles is to keep flowing in the body through the blood vessels.The left ventricle pumps oxygenated blood to all parts of the body while the right ventricle pumps blood only to the lungs.
Kinyita answered the question on February 11, 2018 at 07:00
-
a) Name the process that results to formation of tissue fluid.
b) What is serum?
(Solved)
a) Name the process that results to formation of tissue fluid.
b) What is serum?
Date posted:
February 10, 2018
.
Answers (1)
-
State the structural adaptations of veins to their function.
(Solved)
State the structural adaptations of veins to their function.
Date posted:
February 10, 2018
.
Answers (1)
-
State two structural adaptations of veins to their function.
(Solved)
State two structural adaptations of veins to their function.
Date posted:
February 10, 2018
.
Answers (1)
-
(a)Name two cardiovascular diseases. (b)If the nerve supply to the heart of a mammal is severed the rhythmic heart contraction and relaxation will go on and...
(Solved)
a)Name two cardiovascular diseases.
(b)If the nerve supply to the heart of a mammal is severed the rhythmic heart contraction and relaxation will go on and heart continues to beat. Explain why.
Date posted:
February 10, 2018
.
Answers (1)
-
Differentiate between gaseous exchange and ventilation.
(Solved)
Differentiate between gaseous exchange and ventilation.
Date posted:
February 10, 2018
.
Answers (1)
-
State one adaptation of the following parts of mammalian eye.
(i) Fovea centralis.
(ii) Sclera.
(iii) Cilliary body.
(Solved)
State one adaptation of the following parts of mammalian eye.
(i) Fovea centralis.
(ii) Sclera.
(iii) Cilliary body.
Date posted:
February 10, 2018
.
Answers (1)
-
List down the roles of lipids in the body
(Solved)
List down the roles of lipids in the body.
Date posted:
February 10, 2018
.
Answers (1)
-
Give five functions of peptides
(Solved)
Give five functions of peptides
Date posted:
February 10, 2018
.
Answers (1)
-
Name three animals in phylum chordata?
(Solved)
Name three animals in phylum chordata?
Date posted:
February 9, 2018
.
Answers (1)
-
Explain physical barriers that mediate natural immunity
(Solved)
Explain the physical factors that mediate natural immunity.
Date posted:
February 8, 2018
.
Answers (1)
-
Explain the various conditions necessary for germination
(Solved)
Explain the various conditions necessary for germination
Date posted:
February 8, 2018
.
Answers (1)
-
Name three supportive tissues in plants.
(Solved)
Name three supportive tissues in plants.
Date posted:
February 6, 2018
.
Answers (1)
-
State two adaptations of Guard cell to its function in plant tissue.
(Solved)
State two adaptations of Guard cell to its function in plant tissue.
Date posted:
February 6, 2018
.
Answers (1)
-
In which form is carbon (IV) oxide transported in the body.
(Solved)
In which form is carbon (IV) oxide transported in the body.
Date posted:
February 6, 2018
.
Answers (1)
-
What is the causative agent of cholera?
(Solved)
What is the causative agent of cholera?
Date posted:
February 6, 2018
.
Answers (1)
-
Describe Amitosis as a type of cell division.
(Solved)
Describe Amitosis as a type of cell division.
Date posted:
February 2, 2018
.
Answers (1)
-
Define the term Genomic imprinting.
(Solved)
Define the term Genomic imprinting.
Date posted:
February 2, 2018
.
Answers (1)
-
Define the term incomplete dominance.
(Solved)
Define the term incomplete dominance.
Date posted:
February 1, 2018
.
Answers (1)
-
Outline eight means of asexual reproduction in organisms.
(Solved)
Outline eight means of asexual reproduction in organisms.
Date posted:
February 1, 2018
.
Answers (1)
-
Define the term analogous structures in evolution as studied in biology.
(Solved)
Define the term analogous structures in evolution as studied in biology.
Date posted:
January 31, 2018
.
Answers (1)