Body SystemsHow is your body like a

machine?

Let’s think back….

• Why do all the body systems work together?

To maintain homeostasis!

Four major themes

• 1. feedback loops• 2. structure and function• 3. division of labor• 4. interdependence of organ

systems

SKELETAL SYSTEM• What are the functions?

-produces red and white blood cells-movement

• What other systems are involved?

-structural support-provide minerals

-muscular-immunecirculatory

MUSCULAR SYSTEM

• What other systems does it involve?

• What are the functions?-movement (body parts, digestion, circulation)

-Skeletal

-Digestive-Circulatory

-Nervous

Muscle Types

SKELETAL SMOOTH CARDIAC

How do you bend your elbow?

• The bicep muscle contracts, causing the elbow to bend.

• The tricep muscle contracts, causing the elbow to straighten.

This works similar to what simple machine?

To what are muscles attached?

LYMPHATIC SYSTEM

Helps protect the body from disease

Collects fluid lost from blood vessels and returns the fluid to the circulatory system

LYMPHATIC SYSTEM• What are the

functions?• protect body from disease

• contains white blood cells, antibodies and lymph

INTEGUMENTARY SYSTEM

Function System

Protection/Barrier Immune

Protect Against Dehydration

Excretory

Cutaneous Sensation Nervous

Regulate Body Temp Excretory

Excrete Sweat, Gases Excretory

Integumentary

Epidermis

Dermis

Sebaceous Gland

Sweat Gland

Hair

• How does skin vary in different organisms?

NERVOUS SYSTEM• What are the functions?

• Respond to internal and external stimuli

• How does the nervous system work?

• What other systems are involved?• all

Nucleus

Dendrite

Axon

Cell body

The Brain

Hypothalamus

Brain Stem

Cerebrum

Cerebellum

EXCRETORY • What are the functions?

• Detoxifies blood–Urea, water, salts,

excess glucose, excess protein

• What other systems are involved?

• Circulatory

ExcretoryKidney

Ureter

Bladder

Urethra

Blood

Urine

REPRODUCTIVE• What are the functions?

• produce gametes

• secondary sex characteristics

• produce hormones

• What other systems are involved?

• Endocrine

Reproductive

Uterus

Fallopian Tube

Ovary

Testes

ENDOCRINE• What are the functions?

-deliver chemical messages through the body

-produce hormones

• What other systems are involved?

• nervous• circulatory

EndocrineHypothalamus

Thyroid

Adrenal

Pituitary

Pancreas

Remember feedback loops?Hypothalamus

(Brain)

Releasing hormone

Release-inhibitinghormone

Thyroid stimulating hormone

Thyroid Gland

Low thyroid hormone level

High thyroid hormone level

Production Stimulated

Production Inhibited

CIRCULATORY• What are the functions?

- transport:-gases-fluids-waste products-nutrients-hormones

• What other systems are involved?• Excretory• Respiratory• Endocrine

Circulatory

Heart

Vein

Aorta (Artery)

Capillary

RESPIRATORY• What are the functions?

-exchange of carbon dioxide and oxygen between the blood, air and tissues

• What other systems are involved?• Circulatory

Respiratory

Lungs

Diaphragm

Alveoli

Trachea

Bronchi/Bronchioles

• Where does gas exchange take place?

DIGESTIVE• What are the functions?

• to break down food into smaller particles with the help of enzymes so it can be absorbed and used by cells.

• What other systems are involved?

• Circulatory• Nervous

Digestive

Mouth

LiverStomach

Small Intestine

Large IntestineRectum

Esophagus

Pancreas

Salivary Glands

Digestive• What substances help break

down the food that you eat? ENZYMES

Compound Enzyme Monomer

Starch

Lipids

Proteins

Bile/Lipase

Amylase

Protease

Monosaccharide

Fatty Acids/ Glycerol

Amino Acids

Digestive

• Follow the path of food during digestion.

• Where is food mechanically digested? Chemically digested?