Anatomy unit 1 introduction notes

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This document provides an overview of the 14 major organ systems that make up the human body. It describes each system's function and main components. The organ systems work together across multiple levels of organization, from atoms and molecules to tissues and whole organs, to carry out essential life functions like homeostasis, movement, digestion, waste removal, and reproduction. Maintaining internal stability and responding to changes in the environment allows organisms to survive.

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ANATOMY

Unit 1 Notes:
Organ Systems
& Living
Organization

(1) Living Organization
• All living things are made of cells and
atoms/molecules.
• Levels of Organization:
– Atoms and Molecules
– Organelles and Cells
– Tissues
– Organs
– Organ Systems
– Organism

(2) Atoms, Molecules & Reactions
• The basis of all living things is atoms.
• All living things contain at least the following
biological elements:
C H O N P S
• All cellular processes are driven by energy
exchange and the movement and reacting of
different molecules.

(3) Homeostasis
• Involuntary processes and reactions are in place to
maintain Homeostasis within cells.
• Homeostasis = Internal stability / balance.
• Examples:
– Shivering when cold.
– Production of red blood cells when oxygen drops.
– Buffering of acidic foods using bicarbonate.

(4) Nervous System
• Function:
– Controls all other organ systems.
– Allows you to respond to changes/stimuli.
– Allows you to maintain homeostasis.

• Made Up Of:
– Brain
– Spinal Cord
– Nerves
– Neurons

(5) Lymphatic System
• (A.K.A. The Immune System)
• Function:
– Protect body against harmful infectious agents +
compounds.

• Made Up Of:
– White Blood Cells
– Antibodies and Antigens
– Lymph Vessels, Nodes, and Fluid

(6) Cardiovascular System
• Function:
– Work with the respiratory system to circulate gases.
– Pump nutrients throughout the body to working
tissues.

• Made Up Of:
– Heart
– Blood Vessels
– Blood + Blood Cells

(7) Respiratory System
• Function:
– Work with the cardiovascular system to circulate gases.
– Bring oxygen into body + expel carbon dioxide.

• Made Up Of:
– Nasal Cavity
– Trachea + Bronchioles
– Lungs
– Diaphragm

(8) Skeletal System
• Function:
– Provide body support and mobility.
– Protect organs.
– Store minerals and growth hormones.

• Made Up Of:
– Bones
– Joints
– Cartilage

(9) Muscular System
• Function:
– Allow for body mobility by working with skeletal
system.
– Produce body heat.
– Allow for organ function and movement.

• Made Up Of:
– Muscle
– Ligaments + Tendons

(10) Digestive System
• Function:
– Break food into smaller pieces.
– Metabolize biomolecules within food.
– Absorb useful nutrients + expel waste.

• Made Up Of:
– Oral Cavity + Esophagus
– Stomach
– Small + Large Intestine
– Rectum + Anus

(11) Excretory System
• (A.K.A. The Urinary System)
• Function:
– Filter Blood.
– Remove excessive / harmful compounds within blood.

• Made Up Of:
– Kidneys
– Ureters
– Bladder
– Urethra

(12) Reproductive System
• Function:
– Pass genes on to produced offspring.

• Made Up Of:
– Male  Sperm, Testes, Penis
– Female  Eggs, Ovaries + Uterus, Vagina

(13) Endocrine System
• Function:
– Produce hormones.
– Control and initiate the progress of growth,
development, organ function, and reproduction.

• Made Up Of:
– Glands
– Hormones

(14) Integumentary System
• Function:
– Protect internal organs.
– Allow for increased manipulation.
– Increase heat barrier.
– Produce vitamins.

• Made Up Of:
– Skin
– Nails
– Hair

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Anatomy unit 1 introduction notes