Human Anatomy – Study Notes
1. Definition of Human Anatomy
Human anatomy is the study of the structure of the human body and the relationships between body
parts. It is often studied alongside physiology, which explains how the body functions.
2. Levels of Organization in the Human Body
• Chemical level – atoms and molecules such as water, proteins, and DNA.
• Cellular level – cells are the basic units of life.
• Tissue level – groups of similar cells performing functions.
• Organ level – tissues combine to form organs.
• Organ system level – organs working together.
• Organism level – the complete human body.
3. Types of Body Tissues
Epithelial Tissue
Covers body surfaces and organs. Functions include protection, absorption, and secretion.
Examples include skin and intestinal lining.
Connective Tissue
Supports and connects tissues. Examples include bone, cartilage, blood, and fat.
Muscle Tissue
Responsible for movement. Types include skeletal muscle (voluntary), cardiac muscle (heart), and
smooth muscle (organs).
Nervous Tissue
Found in brain and nerves and transmits electrical signals throughout the body.
4. Major Body Systems
• Integumentary – protection and temperature control.
• Skeletal – support and protection.
• Muscular – movement.
• Nervous – control and coordination.
• Endocrine – hormone regulation.
1. Definition of Human Anatomy
Human anatomy is the study of the structure of the human body and the relationships between body
parts. It is often studied alongside physiology, which explains how the body functions.
2. Levels of Organization in the Human Body
• Chemical level – atoms and molecules such as water, proteins, and DNA.
• Cellular level – cells are the basic units of life.
• Tissue level – groups of similar cells performing functions.
• Organ level – tissues combine to form organs.
• Organ system level – organs working together.
• Organism level – the complete human body.
3. Types of Body Tissues
Epithelial Tissue
Covers body surfaces and organs. Functions include protection, absorption, and secretion.
Examples include skin and intestinal lining.
Connective Tissue
Supports and connects tissues. Examples include bone, cartilage, blood, and fat.
Muscle Tissue
Responsible for movement. Types include skeletal muscle (voluntary), cardiac muscle (heart), and
smooth muscle (organs).
Nervous Tissue
Found in brain and nerves and transmits electrical signals throughout the body.
4. Major Body Systems
• Integumentary – protection and temperature control.
• Skeletal – support and protection.
• Muscular – movement.
• Nervous – control and coordination.
• Endocrine – hormone regulation.
