Human System

Study of the human body

Science of body Function

• Thoracic- ends at diapragm
• Abdominal
• Pelvic- Can collect 3L of blood without any signs

• The cell is the fundamental unit of the human body.
• movement
• conductivity
• merablic absorption
• secretion
• excretion
• respiration
• reproduction

• Aerobic- with O2
• Anarobic- without O2

Group of cells that perform a similar function

• Lines internal and external body surfaces and protects the body. Some forms perform specialized functions
• Secretion
• Absorption
• Diffusion
• Filtration

• Proper
• Fluid - blood and Lymph ( cantaned in lymphatic system)
• Supporting - Cartilage and Bone

Contracts when stimulated.

Found only within the heart. Unique capability of spontaneous contraction w/e external stimulation

• Found with in intestines and encircling blood vessels
• Generally under control of the autonomic nervous system.

allows movement and is generally under coluntary control - most abundant type. ( brain activated.)

Specialized Tiwwue that transmits electrical impulses throughought the body. ( spinal cord, peripheral nerves)

structure made up of 2 or more kinds of tissue organized to perform a more complex function.

Group of organs arranged to perform a more complex function than can any one organ alone. 11 major systems

Connects bones with Muscle

Bone to Bone

Hyoid Bone

• 7- cervical
• 12- thoracic
• 5- lumbar
• 5- sacral ( 5 fused)
• 4 or 5- coccyx

• protects vital organs in the thorax
• prevents collapse of the thorax during respiration.

Consists of the bones of extremities

Hyoid bone.

• Fibrous
• Cartilaginous
• Synovial- Contain synovial fluid allows movement between articulation bones accounts for most joings of appendiculat skeleton.

• movement
• postural maintenance
• heat protection

Voluntary muscle- found through the body

limited to the heart

Involvuntary muscles. intestines and surrounds blood vessles.

• Sensory- voluntary
• Motor - Involuntay

Vegas Nerve

Bran spinal cord

Collects info from both inside and outside the body. Relays info by AFFERENT fibers to the CNS and EFFERENT fibers from CNS to rest of body

Pia matter- arachnoid-dura- skull ( meningeal coverings of the brain and spinal cord.

Refers to skin surface area suppled by a single spinal nerve

Actlecoline

Thoracis and lumber ganglia- Epinephrine and norepinephrine- alpha and beta receptors

Receptors lie in the mucosa and upper part of the nasal cavity. Nerve impulses interpreted by the brain as specific odors.

Bodies messenger system

Dissolved in blood plasma and quickly distributed throughout the body.

Secrete hormones directly into the circulatory system.

spinephrine and norepinephrine- sympotetic nervous system

insulin and glucagon

secrete substances such as sweat, saliva, tears mucus ect. pushing "stuff" out of the bloodstream.

• Chemoreceptors respond to chemical stimuli
• Barareceptors respond to pressure changes
• alpha and beta receptors - neaurotransmitters and meds

Building up( anabolism) and breaking down ( catabolism) of biochems substances and produce energy.

fibrous sac surrounding the heart.

inside layer of the heart

located in the mediastinum of the thoracic cavity 2/3 of the hearts mass lies in left sternum

Pulm artery

Pulmonary veins

Blood enters heart at Pul veins into Left ven 1st- passes through left atrium into left ventrical and then into aotra. from aorta blood is pumped throughout the body.

Carina

mechanical movement

gas exchange

• PLTBBA
• parynx
• larynx
• trachia
• broncie
• bronciolas
• aviolie

Directly covers the lungs

Uterus

CAPillary level

left sternum

Meds to break apart clots

heart muscle

Allows blood to flow from ateries to veins without passing through capillaries

Into the heart

away from the heart

Structures located above the glottis

Begins at uvula and extends down into the apiglottis opens into the oral cavity

larynx