JobAleart.in (jobalert)
1. Skeletal System (Bones & Joints)
Bones: Provide structure and support to the body. The human body has 206 bones in adulthood.
Joints: Connect bones and allow movement (e.g., knee joint, elbow joint).
Skull: Protects the brain.
Spine (Vertebral Column): Supports the body and protects the spinal cord.
2. Muscular System (Muscles)
Helps in movement, posture, and blood circulation.
There are three types of muscles:
Skeletal Muscles (voluntary, like arms & legs).
Smooth Muscles (involuntary, like in the digestive system).
Cardiac Muscle (found only in the heart).
3. Nervous System (Brain, Spinal Cord, Nerves)
Brain: The control center of the body, responsible for thinking, memory, and coordination.
Spinal Cord: Transmits signals between the brain and the body.
Nerves: Carry messages from the brain to different body parts.
4. Circulatory System (Heart & Blood Vessels)
Heart: Pumps blood throughout the body.
Blood Vessels:
Arteries: Carry oxygen-rich blood from the heart to the body.
Veins: Carry oxygen-poor blood back to the heart.
Capillaries: Connect arteries and veins, allowing exchange of oxygen and nutrients.
5. Respiratory System (Lungs & Airways)
Nose & Mouth: Take in oxygen and release carbon dioxide.
Trachea (Windpipe): Connects the mouth to the lungs.
Lungs: Oxygenate the blood and remove carbon dioxide.
6. Digestive System (Stomach, Intestines, etc.)
Mouth: Chews food and mixes it with saliva.
Esophagus: Transfers food to the stomach.
Stomach: Breaks down food with acids and enzymes.
Small Intestine: Absorbs nutrients from food.
Large Intestine: Absorbs water and forms waste.
7. Excretory System (Kidneys, Urinary Bladder, etc.)
Kidneys: Filter waste from the blood and produce urine.
Urinary Bladder: Stores urine before excretion.
8. Endocrine System (Hormones & Glands)
Pituitary Gland: The "master gland" that controls other glands.
Thyroid Gland: Regulates metabolism.
Adrenal Glands: Help control stress response.
Pancreas: Produces insulin to regulate blood sugar.
9. Reproductive System (Male & Female Organs)
Male: Testes produce sperm and testosterone.
Female: Ovaries produce eggs and hormones like estrogen.
10. Integumentary System (Skin, Hair, Nails)
Skin: The largest organ, protects the body, and regulates temperature.
Hair & Nails: Provide protection and enhance sensory perception.