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The Function of the circulatory system is to permit blood to flow through your body & transport nutrients
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Three independent systems that work together:

The heart (cardiovascular)

Lungs (pulmonary)

Arteries, Veins, Coronary, & Portal Vessels (Systematic)

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Returns to the blood supply, fluids, and proteins. Transport Lipid houses.

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Protects the body from various kinds of damage, such as loss of water or abrasion from outside
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Skin- Keeps the moisture, keeps foreign things out, Body Temp., gets rid of waste, absorbs vitamin D, skin cancer
Hair- Protects us from UV light & keeps us warm, reproduces when cut & grows longer, attached into the skin.
Nails- Protects the sensor in our fingers & toes.

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has two functions: The first is to produce egg cells, and the second is to protect and nourish the offspring until birth. The male reproductive system has one function, and it is to produce and deposit sperm.
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Female produces gameles, eggs, hormones, and can deliver a baby.

Male produces gameres, stores sperm.

Both Produce a Human offspring

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Balances homeostasis, produces urinary, filter blood, and eliminates waste.

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Takes in oxygen and expells carbon dioxide.
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Facts:

A newborn's normal breathing rate is about 40 times each minute.

For adults, the averagerespiratory rate for adults is 12 to 16 breaths per minute

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The endocrine system is the collection of glands that produce hormones that regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep, and mood, among other things
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The endocrine system gets some help from organs such as

Kidney

Liver

Heart

Gonads

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Monitors external and internal receptors. Responds and interprets to stimuli.
Spine:

Cervical and nerves

Thoracic and nerves

Lumbar and nerves

Sacral and nerves

Coccygeal and nerves

Brain's three most important parts:

Cerbrum

Medulla

Cerebellum.

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breaks down food, absorbs food, and eliminates waste.
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Six Major Functions take place in the system:

Ingestion

Secretion

Mixing and movement

Digestion

Absorption

Excretion

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The Muscular System
Movement & The maintenance of posture and body position.
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Types:

Skeletal

Smooth

Cardiac

Facts:

Muscles make up about 40% of total body weight.

Muscles cannot push, they pull.

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Performs wital functions- support, movement, protection, blood ceel reproduction, calcium storage and endocrine regulation.
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Types:

Hydrostatic Skeleton

Exoskeleton

Endoskeleton

Human Axial Skeleton

Human Appendiculas Skeleton

Facts:

620 bones total

Over half of the body's bones are in the hands and feet.