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
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
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
If you study 9th, and 10th class biology then
These questions are mostly asked in Pakistan board and other competitive exams like PPSC, CSS, PMS, KPPDC, GK, FPSC, and other board exams.
#All about human biology, #Biology, #Human Biology
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