SureDen
SEXUAL REPRODUCTION involves formation of male and female gamates, either by the same individual or different individuals of opposite sex.These gametes
Human male reproductive system:
The male reproductive system consist of the following:
Primary sex organs: Testis
Human digestive system:
Body parts including mouth from where food enters, digestive organs & elimination organs in digestive system are collectively called alimentary system or alimentary canal.
It has 4 layers:-
1
Pre-fertilization Events:
These events of sexual reproduction are prior to the fusion (fertilization) of male and female gametes.
a) &nbs
Human female reproductive system:
The female reproductive system consist of following:
Primary sex organs: Ovary
Spermatogenesis:
The process of formation of sperm from diploid spermatogonia is called spermatogenesis.
Proces
Human Immune system: Components of immune system:-
Lymphoid organs
Immune cells
Oogenesis:
The process of formation of mature female gamete in the ovary of females is called oogenesis.
Human genome project:
The total cost of the project was 9 billion US dollars and this project was a 13-year project by the U.S. D
Infectious diseases:
These are further divided into five classes:
1) Bacterial infectious diseases: For example; typhoi
Menstruation cycle:
The reproductive cycle in the female primates (e.g. monkeys, apes and human beings) is called m
Pregnancy:
Some finger-like projections appear on the trophoblast called chorionic villi which are surrounded by the uterine
Human heart:
Human heart is divided into different chambers internally. 1 or 2 auricles and 1 or 2 ventricles, these are called true chambers. Study of heart is called cardiology.
(1) Fishes have a heart with 2 chambers (
Human Excretory System:
Post Fertilization Events:
Events in sexual reproduction after the fertilization (formation of zygote) are called post fertilization events. These events may be d
Transgenic animals:
Animals that have had their DNA manipulated to possess and express an extra gene are known as transgenic animals
Human respiratory system:
Firstly, Nose which has two external nostril opening. It leads to nasal chamber which further leads to naso-
Fertilisation:
The process of fusion of a sperm with an ovum is called fertilisation.
During copulation, semen is
Implanatation:
Zygote divide by mitosis and process is called cleavage.
As a result, 2, 4, 8, 16 daughter cel
Non infectious diseases:
AIDs and Cancer are explained below:
Important points regarding human history and origin:
(1) Closest primate of Human is Gorilla
(2) Human evolution started in Africa
Types of diseases in human beings:
An abnormal condition of the body or mind that causes discomfort to us is called disease.
Duct system of human digestive system:
Duct
Question 1: Determine whether each of the following relations are reflexive, symmetric and
transitive:
(i) Relation R in the set A = {1,
Significance of Carbohydrates:-
The carbohydrates perform the two important functions in living bodies:
(a) They act as bio fuels to pro
Evolution of Man:
Sex Determination: Bridges had given the balance theory of Sex – determination. Bridges
*Sex Determination in human being:
Antibody:
Each antibody molecule has four peptide chains, two small called light chains and two longer
Introduction:
The sum total of all processes by which all living organisms attain food and utilize it to use in various biological activities such
Human Endocrine glands:
Endocrine glands are of two types:
· Purely endocrine glands
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