Human Anatomy Flashcards
About 98% of the human body is composed of what 6 elements?
- Oxygen
- Carbon
- Hydrogen
- Nitrogen
- Calcium
- Phosphorous
What are the 4 main tissues in the body?
- Muscle
- Nervous
- Connective
- Epithelial
What is tissue?
Collection of similar cells and their intracellular substances
What are fatty acids?
Monobasic acids, especially those found in animal and vegetable oils
What are triglycerides?
The storage form of fat made up of three fatty acids and a glycerol group
What is insulin?
A polypeptide hormone functioning in the regulation of the metabolism of carbohydrates, and fats, especially the conversion of glucose to glycogen, which lowers blood glucose levels
What is glucose?
Principal circulating sugar in the blood and the major energy source of the body
The nucleus houses the ________ of the cell.
Deoxyribonucleic Acid (DNA)
The human cells contains how many chromosomes?
46 chromosomes - 24 matching pairs
____ are the most numerous of cell organelles.
Ribosomes
____ is the powerhouse of the cell.
Mitochondria
What is a glycogen granule?
Structure of the cell that stores glycogen and enzymes for glycogen breakdown and synthesis
What is gluconeogenesis?
Chemical process that converts lactate and pyruvate back into glucose
What is glycolysis?
The metabolic process that creates energy from the splitting of glucose to form pyruvic acid or lactic acid and ATP
What are the 4 groups of epithelial tissue?
- Squamous epithelium
- Cuboidal epithelium
- Columnar epithelium
- Glandular epithelial cells
Describe squamous epithelium.
Composed of one layer of flat cells. Located in the linings of the mouth, esophagus, and blood and lymphatic vessels. Substances can easily diffuse through this layer
Describe cuboidal epithelium.
Made of cube-shaped cells as found in the lining of kidney tubules
Describe columnar epithelium.
Resembles a column or pillar in shape. Widespread throughout the body, forming linings in the respiratory and digestive tracts.
Describe glandular epithelial cells.
Secrete mucus and hormones, such as those of the salivary and thymus glands
Describe connective tissue.
Serves to connect structures and provide support.
Connective tissue contains one or more of what three fibers?
- Collagen
- Reticular
- Elastic
What are collagen fibers?
Tough, strong fibers that form the major fibrous component of the skin, tendons, cartilage, ligaments and teeth. Gives connective tissue it’s versatility
Connective tissue is made up of what amino acids?
- Glycine
- Proline
- Lysine
- Hydroxyproline
- Hydroxylysine
What are reticular fibers?
Delicate, supportive fibers of connective tissue that occur in networks and support structures such as capillaries and nerve fibers
What are elastic fibers?
Extendible fibers that are designed to maintain elasticity, thus providing resilience in tissues such as skin, arteries and lungs
What are tendons?
Connective tissue that attaches muscle to bone
What are ligaments?
Connective tissue that connects bone to bone or bone to cartilage
Muscle tissue composed approximately ___ % PF an average man’s body weight, and ___% of an average woman’s body weight.
43, 34
What is nervous tissue?
Main component of the nervous system; CNS and PNS
The ____ and ____ make up the Central Nervous System(CNS).
Brain, spinal cord
What are neurons?
Conduct nerve impulses, register sensory impulses, and conduct motor impulses
What is neuroglia?
Consist of a delicate network of branched cells and fibers that supports the tissue of the Central Nervous System(CNS)
What is neurosecretory?
Large neurons that produce secretions, which travel along neuron axons and are typically released into the bloodstream. Function to translate neural signals into chemical stimuli in the body
What are the 10 principal systems of the body?
- Integumentary
- Skeletal
- Muscular
- Nervous
- Endocrine
- Circulatory
- Respiratory
- Digestive
- Urinary
- Reproductive
What are the two subsystems of the circulatory system?
- Cardiovascular
2. Lymphatic
Describe the integumentary system.
Consists of the skin and it’s associated structures, such as the hair, nails, sweat glands, and sebaceous glands
Describe the skeletal system.
Consists of bone and cartilage that supports and protects the body
Describe the muscular system.
Consists of large skeletal muscles that allows us to move, cardiac muscle in the heart, and smooth muscle of the internal organs
Describe the nervous system.
Consists of the brain, spinal cord, sense organs and nerves. Regulates other systems
Describe the endocrine system.
Consists of the glands and tissues that release hormones. Works with the nervous system in regulating metabolic activities
Describe the circulatory system.
Consists of the heart and blood vessels that serve as the transportation system
Describe the lymphatic system.
Subsystem of the circulatory system, which protects the body from disease