body systems
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30 Terms
What is the basic unit of life in the human body?
Cells
What are groups of similar cells performing a common function called?
Tissues
What are structures composed of different tissues working together to perform tasks?
Organs
What do we call groups of organs that collaborate to perform complex functions?
Organ Systems
What type of tissue covers body surfaces and lines internal cavities?
Epithelial Tissue
What type of tissue supports and binds other tissues, including bone and blood?
Connective Tissue
Which type of muscle tissue is voluntary and attached to bones?
Skeletal Muscle
What is the involuntary muscle found in the heart called?
Cardiac Muscle
What type of muscle is found in the walls of internal organs?
Smooth Muscle
What type of tissue transmits electrical impulses throughout the body?
Nervous Tissue
What system coordinates body activities by transmitting electrical signals?
Nervous System
Which system regulates bodily functions through hormones?
Endocrine System
What system provides structural support and protects internal organs?
Skeletal System
What system enables movement and maintains posture?
Muscular System
Which system breaks down food into nutrients for absorption?
Digestive System
What system transports oxygen, nutrients, and wastes?
Circulatory System
Which system facilitates gas exchange of oxygen and carbon dioxide?
Respiratory System
What system eliminates waste products and maintains fluid balance?
Urinary System
Which system protects the body and includes skin, hair, and nails?
Integumentary System
What systems defend against pathogens and maintain fluid balance?
Immune and Lymphatic Systems
What system enables reproduction?
Reproductive System
What is the maintenance of a stable internal environment despite external changes?
Homeostasis
What is the mechanism that counteracts deviations from a set point called?
Negative Feedback
What mechanism amplifies responses and is less common?
Positive Feedback
What is the outermost layer of skin?
Epidermis
What layer lies beneath the epidermis and contains connective tissue?
Dermis
What function does the skin perform to protect against environmental hazards?
Protects against environmental hazards.
How does the skin help regulate body temperature?
Through sweating and blood flow.
What does the skin prevent to maintain hydration?
Water loss.
What vitamin is synthesized by the skin when exposed to sunlight?
Vitamin D.