Chapter 1: Into To The Human Body Flashcards
Anatomy
Ana-up
Tomy- Process of cutting.
The science of body structures and relationship among them. First studied by dissection
Dissection
Dis-apart
Section-act of cutting
The careful cutting apart of body structures to study their relationships.
Physiology
Physio-nature
Logy- study of
Is the science of body functions, how the body works.
Chemical Level
The very basic level. Can be compared to the letters of the alphabet.
Includes atoms and molecules.
Atoms
The smallest units of matter that participate in chemical reactions.
Molecules
Two or more atoms joined together.
Cells
The basic structural and functional units of an organism that are composed of chemical.
The smallest living units in the human body.
Tissues
Groups of cells and the materials surrounding them that work together to perform a particular function.
4 Types of Tissue in Body
Epithelial Tissue
Connective Tissue
Muscular Tissue
Nervous Tissue
Organs
Structures that are composed of two or more different types of tissues. They have specific functions and usually have recognizable shapes.
System
Consists of related organs with common functions.
Organism
All the parts of the human body functioning together constitutes the total organism.
Metabolism
The sum of all chemical processes that occur in the body.
2 phases of Metabolism
- Catabolism: the breakdown of complex chemicals into similar components.
- Anabolism: the building up of complex chemicals substance from smaller, simpler components.
Responsiveness
Ability to detect change in the body and respond to it.
Movement
Includes motion of the whole body, individual organs, single cells and tiny structures inside cells.
Growth
Increase in body size due to an increase in the size of existing cells, and/or increase in the number of cells.
Differentiation
Development of a cell from an unspecialized to a specialized state.
Stem Cell
Precursor cells that can divide and give rise to cells that undergo differentiation.
Reproduction
2 Parts:
1. The formation of new cells for tissue growth, repair or replacement.
2. The production of a new individual.
Homeostasis
Homeo- sameness
Stasis- standing still
The maintenance of relatively stable conditions in the body’s internal environment.
Intracellular Fluid (ICF)
Fluid within cells
Extracellular Fluid (ECF)
Fluid outside the cell
Interstitial Fluid
The ECF that fills the narrow spaces between the cells of tissues
Blood Plasma
ECF that that is within blood vessels
Lymph
ECF within lymphatic vessels
Cerebrospinal Fluid
ECF in and around the brain and spinal cord
Synovial Fluid
ECF in joints
Aqueous Humor and Vitreous Body
ECF of the eyes
3 Components of Feedback System
- Receptors
- Control Center
- Effectors
Afferent Pathway
Information flows toward the control center
Efferent Pathway
Information flows away from the controls center
Input
Is in the form of nerves impulses or chemical signals
Output
In the form of nerve impulses, hormones or chemical signals.
Anatomical Position
The subject is standing erect facing an observer. Head level and eyes facing directly forward. Lower limbs are parallel and the feet are flat on the floor directed forward. The upper limbs are at the sides with the palms turned forward.
Prone
Reclining body, body laying face down.
Supine
Recline body, body is lying face up.
Directional Terms
Words that describe the position of one body’s part relative to another.
Superior
Toward the head or the upper part of a structure.
Inferior
Away from the head
Anterior
Nearer to or at the front of the body.
Posterior
Near to or at the back of the body.
Medial
Near to the midline. Divides the body into equal right and left sides.
Lateral
Farther away from the midline.
Intermediate
Between two structures.
Ipsilateral
On the same side of the body as another structure.
Contralateral
On the opposite side of the body from another structure.
Proximal
Nearer to the attachment of a limb to the truck. Nearer to the origination.
Distal
Farther from the attachment of a limb to the truck. Father away from the origination.
Superficial
Toward to on the surface of the body.
Deep
Away from the surface of the body.
Planes
Imaginary flat surfaces that pass through the body parts.
2 Body Systems that Maintain Homeostasis
- Nervous System
By regulating body temperature to maintain body’s internal environment. - Endocrine System
By controlling blood sugar (glucose) levels by using insulin.
Directional Terms
Words that describe the position of ones body part relative to another.
Anatomical Planes
Imaginary flat surfaces that pass through body parts.
Sagittal Plane
Vertical line that divides the body/organ into right and left sides
Midsagittal Plane
Or median Plane
Planes passes through the midline of the body/organ, divides into equal right and left sides
Midline
Imaginary vertical line that divides the body into equal left and right sides.
Parasagittal Plane
Divides the body/organ into unequal right and left sides.
Frontal
Or coronal plane
Divides body/organ into anterior and posterior portions
Transverse Plane
Divides body/organ into superior and inferior portions
Oblique Plane
Passes through the body/organ at an angle (any angle other than 90 degrees)
Section
Cut of the body or one organ made along a plane.
3 types of Sections
Midsagittal: Made down the midline
Frontal: Made down the front, divides body into anterior and posterior parts
Transverse: Made across from front to back, divides the body into superior and inferior parts
Viscera
Organs inside thoracic and abdomen pelvic cavities
Membrane
Thin, pliable tissue that covers, lines, partitions or connects structures
Serous Membrane
Double layered, slippery
Does not open directly to exterior
Covers viscera
Lines walls of thorax and abdominopelvic cavities
Retoperitioneal
Organs that are not surrounded by the peritonuem
Instead they are posterior to it