Monday, April 15, 2024

All About Human Body (Biology)

All about the Human body
System of organs:
Skeletal system:
This system is all about a skeleton’s body framework that provides protection and movement from one place to another.
The skeletal system consists of two parts
1) Axial skeleton
2) Appendicular skeleton
Axial skeletal system:
It contains the vertical axis of the body like the head, chest, etc.
Skull bones
1) Cranial bones, which protect the brain.
2) Facial bones, 14 are facial bones, present on the front of the skull.
There are more bones present like in the ear, malleus, stapes, and incus. The vertebral column consists of 26 bones. The 24 are all vertebrae and are further divided into the following parts.
1) Cervical vertebrae
2) Thoracic vertebrae
3) Lumbar vertebrae
Appendicular skeleton:
It is made up of the bone of the legs and arms.
Pectoral girdle:
It is also called shoulder girdle.
Upper limbs
1) Ulna
2) Radius
3) Humerus
4) Carpals
5) Phalanges
6) Metacarpals
Pelvic girdle:
It is commonly called hips.
The hipbone contains three parts.
1) Ilium
2) Ischium
3) Pubis
Lower limbs:
1) Femur
2) Tibia
3) Fibula
4) Patella
5) Tarsals
6) Metatarsals
7) Phalanges

Muscular system:
The muscles produce heat and allow movement and stability. Proper diet and exercise are necessary for the health and function of the muscular system of the human body. Exercise strengthens and help in muscle growth, while a balanced diet provides necessary nutrient like proteins.
There are three types of muscles in the human body.
1) Skeletal muscle
2) Smooth muscle
3) Cardiac muscle

All about human body
All about the human body

Circulatory system:
It is also called the cardiovascular system.
It plays an important role in maintaining homeostasis and delivering essential substances to cells and other body parts.
Types of circulation:
Almost two types of circulation in the human body.
1) Pulmonary circulation
2) Systematic circulation
The circulatory system consists of the following major components.
1) Heart
2) Blood vessels
3) Blood
Blood vessels consist of three components.
1) Arteries
2) Veins
3) Capillaries
Blood also consists of the following parts.
1) Red blood cells (Erythrocytes)
2) White blood cells (Leukocytes)
3) Platelets (Thrombocytes)
4) Plasma

Circulation in human body
Circulation in human body

Respiratory system:
The respiratory system consists of a collection of organs in the human body responsible for the exchange of gases like breathing, between the body and the surrounding.
It contains the following parts.
1) Nasal cavity
2) Larynx
3) Pharynx
4) Sinuses
5) Lungs
6) Diaphragm
7) Bronchi

Nervous system:
Network of specialized cells responsible for receiving, transmitting, and processing information through electrical and chemical signals allowing for communication and different body functions.
It can control the activity of the body.
It has two main parts.
1) Central nervous system (CNS)
2) Peripheral nervous system (PNS)

Digestive system:
A complex set of organs that work together to break down food and eliminate waste in the human body. It plays an important role in the absorption and digestion of nutrients necessary for energy production, growth, and overall functioning of the body.
The major components of the digestive system are;
1) Mouth
2) Esophagus
3) Stomach
4) Liver
5) Gallbladder
6) Pancreas
7) Small intestine
8) Large intestine
9) Rectum
10) Anus

Reproductive system (Male):
The male reproductive system is a collection of organs, and glands, that work together to produce and deliver sperm for reproduction. It plays an important role in sexual reproduction.
It consists of the following components.
1) Penis
2) Scrotum
3) Testicles
4) Urethra
Reproductive system (Female):
The complex system of organs and hormones that are involved in the production of eggs, fertilization, pregnancy, and childbirth.
It also plays an important role in the menstrual cycle.
The major components of the female reproductive system include;
1) Vagina
2) Uterus
3) Ovaries
4) Fallopian tubes
5) Mammary glands

  • All about the Human body and its parts:
    Number of bones in adults is 206.
    The number of muscles is 639
    The number of kidneys in the body is 2
    The number of milk teeth is 20
    Number of ribs in the human body 24 (12 pairs)
    Number of heart chambers 4
    The largest artery in the human body is “the aorta”
    Normal blood pressure is 120/80mmHg
    The pH of blood is 7.4
    The number of vertebrae in the spine is 33
    The number of vertebrae in the neck is 7
    Number of bones in the middle ear 6
    Number of bones in the face 14
    Number of bones in the skull 22
    Number of bones in the chest 25
    The number of bones in arms is 6
    Number of muscles in human arms 72
    Number of pumps in heart 2
    The largest organ is the skin
    The largest gland is “the liver”
    Biggest cell female ovum
    Smallest cell male sperm
    The smallest bones are stapes
    The first transplanted organ is the heart
    The average length of the small intestine is 7m
    The average length of the large intestine is 1.5m
    The average weight of the newborn baby is 2.6kg
    The pulse rate in one minute is 72 times
    Normal body temperature 37 °c (98.4F)
    The average blood volume of 4 to 5 liters
    The life span of red blood cells is 120 days
    The life span of white blood cells is 10 to 15 days
    Pregnancy period 280 days (40 weeks)
    Number of bones in human foot 33
    Number of bones in each wrist 8
    Number of bones in hand 27
    Largest endocrine gland thyroid
    Largest lymphatic organ spleen
    The largest part of the brain Cerebrum
    Largest and strongest bone femur
    Smallest muscle stapedius (Middle ear)
    Number of chromosomes 46 (23 pairs)
    Number of bones in a newborn baby 306
    The viscosity of blood is 4.5 to 5.5
    Universal donor blood group O
    Universal recipient blood group AB
    Largest White blood cells monocyte
    The smallest WBC is Lymphocyte
    Increase red blood cell count called polycythemia
    The blood bank in the body is the spleen
    Non-nucleated blood cell is red blood cell
    Red blood cells produced in the bone marrow
    The river of life is called the blood
    Normal blood cholesterol level 250mg/dl
    The fluid part of blood is plasma

If you study 9th, and 10th class biology then

Introduction to Biology

Facts about animals

These questions are mostly asked in Pakistan competitive exams like PPSC, CSS, PMS, KPPDC, GK, FPSC, and other board exams.

#All about human biology, #Biology, #Human Biology

Muhammad LuQman Ashraf
Being Ghazali is a Biology, Nature, birds, and all about planets blog covering important CSS news and zoology-related posts. We plan to cover all biology topics and the latest information about zoology. Founded by "Muhammad LuQman Ashraf" with the Grace Of "Allah Almighty". We aim to discover new things, in the future and write all about Wildlife Sanctuary and National Parks in the world.

Related Articles



Please enter your comment!
Please enter your name here

Stay Connected

- Advertisement -spot_img

Latest Articles