Knowledge Encyclopedia Human Body!

Pdf Book Name: Knowledge Encyclopedia Human Body!
Author: Wonder House Books (Author)
Publisher: DK Children, Year: 2017
ISBN-10, 13: 9780241286852,0241286859
Year: 2017
Pages: 210 Pages
Language: English
File size: 74 MB
File format: PDF,EPUB

Knowledge Encyclopedia Human Body!

Books Details:
Sure! The human body is a fascinating and complex system made up of numerous interconnected parts. Here’s a brief overview of its major systems and components:

### 1. **Skeletal System**
– **Function**: Provides structure, support, and protection for organs; enables movement.
– **Components**: Bones, cartilage, ligaments, and joints. The adult human skeleton typically has 206 bones.

### 2. **Muscular System**
– **Function**: Facilitates movement, maintains posture, and produces heat.
– **Components**: Skeletal muscles (voluntary), smooth muscles (involuntary, found in organs), and cardiac muscle (heart).

### 3. **Nervous System**
– **Function**: Controls and coordinates body activities by transmitting signals between different body parts.
– **Components**: Brain, spinal cord, and peripheral nerves. Divided into the central nervous system (CNS) and peripheral nervous system (PNS).

### 4. **Circulatory System**
– **Function**: Transports oxygen, nutrients, hormones, and waste products throughout the body.
– **Components**: Heart, blood vessels (arteries, veins, capillaries), and blood.

### 5. **Respiratory System**
– **Function**: Facilitates gas exchange, bringing oxygen into the body and expelling carbon dioxide.
– **Components**: Nose, pharynx, larynx, trachea, bronchi, and lungs.

### 6. **Digestive System**
– **Function**: Breaks down food into nutrients for energy, growth, and cell repair; eliminates waste.
– **Components**: Mouth, esophagus, stomach, intestines (small and large), liver, pancreas, and gallbladder.

### 7. **Endocrine System**
– **Function**: Regulates bodily functions through hormones.
– **Components**: Glands such as the pituitary, thyroid, adrenal, and pancreas.

### 8. **Immune System**
– **Function**: Protects the body against infections and diseases.
– **Components**: White blood cells, lymph nodes, spleen, thymus, and bone marrow.

### 9. **Integumentary System**
– **Function**: Protects the body, regulates temperature, and provides sensory information.
– **Components**: Skin, hair, nails, and sweat glands.

### 10. **Reproductive System**
– **Function**: Produces offspring and regulates sexual characteristics.
– **Components**:
– **Male**: Testes, penis, prostate.
– **Female**: Ovaries, fallopian tubes, uterus, vagina.

### Interesting Facts
– The average adult human body is made up of about 60% water.
– The heart beats approximately 100,000 times a day.
– The skin is the largest organ, covering about 1.5 to 2 square meters.

If you have specific questions or want to delve deeper into any of these systems, feel free to ask!