BioMed Unit 1.2

Muscular System

Muscular System

Moves the body, moves substances around the body, maintains posture, produces heat

Skeletal System

Protects and supports body organs, provides a framework muscles use for movements, store minerals

Circulatory System

Pumps blood around body, transports carbon and oxygen

Respiratory System

Assists with gas exchange with external environment, keeps blood supplied with oxygen and removes carbon dioxide

Digestive System

Breaks down food into nutrient molecules, absorbs nutrients, rids body of waste

Nervous System

Responds to internal and external changes by acting an appropriate response, processes information

Immune System

Filters fluids in body, attack foreign substances (ex. germs)

Manner

circumstances that result in death are designated as natural or unatural EX: Homicide

Cause

a specific injury, trauma, or disease that directly cause a victim’s death EX: gunshot wound

Mechanism

What happens inside the body to result in death EX: exsanguination (Blood loss)

Medical Examiner

Preforms autopsies

Autopsy

Postmortem examination to determine cause of death

When do Autopsies happen?

When a suspicious or unexpected death occurs

Why are autopsies preformed?

To find out how a person died by internal and external examination

Forensic Entomology

The study of insects and their relation to legal matters (death)

Algor Mortis

Change in body temperature, estimates time in death

Rigor Mortis

The stiffening of body, determines assumed body position at death

Livor Mortis

Blood accumulates to the parts of body touching the ground

Physical Digestion

Mechanical act of breaking down food (chewing)

Chemical Digestion

body’s use of acids and enzymes to break down food (enzymes in saliva)

Human Levels of Organization

Cells-Tissues-Organs-Organ system

Central Nervous System

processes peripheral system’s information, brain and spinal cord

Peripheral Nervous System

Brings information from the outside world, all nerves in body

Occipital Lobe

receives and processes sensory nerve impulses from eye

Parietal Lobe

Crucial in integrating sensory and visual info

Frontal Lobe

Planing and organizing incoming information, controls behavior and emotion

Temporal Lobe

processes language, stores info in long term memory

Traumatic Brain Injury TBI

brain dysfunction caused bu an outside force to head

Chronic Traumatic Encephalopathy CTE

A progressive degeneration and or death of nerve cell caused by repeated head traumas

Bicuspid (Mitral) Valve

regulates blood flow from LA to LV

Tricuspid Valve

Opens to allow blood flow from RA to RV

Aortic Valve

Permits blood flow into aorta from LV

Pulmonary Valve

allows deoxygenated blood to be pumped from RV to pulmonary circulatory

Right Atrium

receives blood from vena cava

Left Atrium

receives blood coming back from lungs

Left Ventricle

Pumps blood to tissues around the body

Right Ventricle

Pushes blood to lungs to get oxygen

Anterior

Front

Posterior

Back

Oxygenated Blood

Higher levels of oxygen, flows to lungs

Deoxygenated Blood

after the oxygenated blood delivers to tissues it collects carbon dioxide in return

Arteries

carries blood away from heart

Veins

Carries blood to heart

Angina

Chest pain due to reduced blood flow to heart

Atherosclerosis with Thrombus

cardiovascular disease from the buildup of plaque in artery walls

Myocardial Infraction

heart attack, blood and oxygen is reduced- causes part of the heart muscle to die

Aortic Valve Stenosis

condition where aortic valve narrows which obstructs blood flow

Patent Foramen Ovale

hole in wall between 2 upper chambers of heart or atria, present at birth

Congestive Heart Failure

Heart cant pump enough blood, heart gets enlarged, caused by different heart disorders