Introduction to Anatomy and Physiology Flashcards
What is the organization of levels in human body?
- Chemical
- Cellular
- Tissue
- Organ
- Organ system
- Organism
What is the smallest unit?
Atom
Define:
Molecule
Formed from two or more atoms, smallest independently functioning unit of living organisms
Define:
Organ
Anatomically-distinct structure composed of two or more tissue types
Define:
Organ system
Group of organs working together to perform major function or meet physiological need
Anatomy is the study of:
Body structure
Physiology is the study of:
Function
Define:
Mechanistic
“how”, process
Define:
Telelogical
“why”, function
Function of the integumentary system?
Encloses internal body structures and hosts sensory receptors
The integumentary system consists of:
- Hair
- Skin
- Nails
Function of the muscular system?
Enables movement and helps maintain body temperature
The muscular system consists of:
- Skeletal muscles
- Tendons
Function of the endocrine system?
Secretes hormones and regulates bodily processes
The endocrine system consists of:
- Pituitary gland
- Thyroid gland
- Pancreas
- Adrenal gland
- Testes/Ovaries
Function of the nervous system?
Detects and processes sensory information and activates bodily responses
The nervous system consists of:
- Brain
- Spinal cord
- Peripheral nerves
Function of the cardiovascular system?
Delivers oxygens and nutrients to tissues and equalizes body temperature
The cardiovascular system consists of:
- Heart
- Blood vessels
Function of lymphatic system?
Returns fluid to blood and defends against pathogens
The lymphatic system consists of:
- Thymus
- Lymph nodes
- Spleen
- Lymphatic vessels
Function of digestive system?
Processes food for use by body and removes waste from undigested food
The digestive system consists of:
- Stomach
- Liver
- Gallbladder
- Large and small intestines
Function of respiratory system?
Removes carbon dioxide from body and delivers oxygen to blood
The respiratory system consists of:
- Nasal passage
- Trachea
- Lungs
Function of urinary system?
Controls water balance and removes waste from blood and excretes them
The urinary system consists of:
- Kidney
- Urinary bladder
Function of reproductive system?
Produces sex hormones and gametes
The reproductive system consists of:
- Epididymis
- Testes
- Mammary glands
- Ovaries
- Uterus
Major functions of organ systems?
- Organization
- Metabolism
- Responsiveness
- Movement
- Development
- Reproduction
Define:
Anabolism
Builds complex substances from simpler molecules
Define:
Catabolism
Breaks down complex substances into smaller molecules
Define:
Homeostasis
Self-regulating processes
Define:
Law of Mass Balance
Amount of substance in body remains constant, gain offset by equal loss
Equation for mass flow:
Mass flow = concentration * volume flow
Define:
Coronal plane
Divides body into dorsal and ventral planes
Define:
Transverse plane
Divides body into superior and inferior planes
Define:
Sagittal plane
Divides body into left and right planes
The ventral cavity consists of:
- Thoracic cavity
- Abdominopelvic cavity
The dorsal cavity consists of:
- Cranial cavity
- Vertebral cavity
The serous membrane lines the:
Pericardial cavity
Define:
Computed tomography (CT)
Non-invasive method used to analyze cross-sectional x-rays
Advantage(s) of CT?
Ideal for scanning soft tissues and diagnostic evaluations
Disadvantage(s) of CT?
Radiation level much higher than that of x-rays
Define:
X-ray
High energy electromagnetic radiation with short wavelength capable of penetrating solids and ionizing gases
Advantages of x-rays?
Ideal for hard tissues like bone and teeth
Disadvantage(s) of x-rays?
- Can cause cancer
- Only produce 2D images from one angle
Define:
Magnetic Resonance Imaging (MRI)
Non-invasive method that exposes patient to magnetic fields and radio waves
Advantage(s) of MRI?
- Ideal for discovery of tumors
- Produces 2D images with resolution of mm
Disadvantage(s) of MRI?
- Loud
- Can be uncomfortable
- Expensive
Define:
Positron Emission Tomography (PET)
Detects radioactive emissions by injecting small amount of radioactive tracer into peripheral vein
Commonly used to measure rate of glucose consumption in body to distinguish between benign and malignant tumors
Advantage(s) of PET?
- Short time to complete (10 to 40 minutes)
- Not painful
Disadvantage(s) of PET?
- Same amount of radiation as CT
Define:
Ultrasonagraphy
Uses transmission of high-frequency sound waves into body to generate echo signal that is converted into real-time image
Typically used to study heart function, blood flow in neck or extremities, fetal growth and development, etc.
Advantage(s) of ultrasonagraphy?
- Noninvasive
Disadvantage(s) of ultrasonagraphy?
- Depends on operator skill
- Unable to penetrate bone and gas