Body structure, and key terms Flashcards
This Structural component of the nucleus, composed of nucleic acids and proteins
& condenses to form ________ during cell division.
Chromatin
Chromosomes
Threadlike structures within the nucleus composed of deoxyribonucleic acid (DNA) that carries hereditary information encoded in genes
Each sperm or egg has ____________. After fertilization, each cell of the embryo then has ____ chromosomes (____ pairs). In each pair of chromosomes, one chromosome is provided by the father and the other by the mother.
Chromosome
23 unpaired chromosomes
46, 23
A Molecule that holds genetic information capable of replicating and producing an exact copy whenever the cell _______
Deoxyribonucleic acid DNA
Divides
Sum of all physical and chemical changes that take place in a cell or an organism
It includes the building up (________) and breaking down (_______) of body constituents.
Metabolism
Anabolism
Catabolism
Cellular structure that provides a specialized function, such as the nucleus (_______), ribosomes (________), Golgi apparatus (_______), and lysosomes (_______)
The _______ of many organelles act as sites of chemical reactions
Organelle
Reproduction
Protein synthesis
Removal of material from the cell
Digestion
Membranes
Five levels of organization are relevant to understanding anatomy, physiology, and pathology: the __________
Cells, tissues, organs, systems, organism
The smallest structural and functional unit of life. Body ____ perform all activities associated with life, including utilizing ______, facilitating ________, and _________ products. Cells have many shapes and sizes, but they share three main structures: _____, _______, and ______. The study of the body at the cellular level is called _______.
Cell 2X
Food, reproduction, eliminating waste
Cell membrane cytoplasm nucleus
Cytology
The ______ acts as a barrier that supports and protects the _______. Within the cell membrane is a jellylike matrix of proteins, salts, water, dissolved gases, and nutrients called ______. Inside the cytoplasm are specialized structures called ______. These perform specific functions of the cell, such as reproduction and digestion. The largest cell organelle is_____, which directs the cell’s activities and contains chromosomes.
Cell membrane
Intracellular contents
Cytoplasm
Organelles
Nucleus
The ______ is responsible for metabolism, growth, and reproduction. It also carries the genetic blueprint of the organism. This blueprint is found in a complex _____ called _____ (DNA) that is organized into a threadlike structure called _____.
Nucleus
Deoxyribonucleic acid
Chromatin
When the ____ is ready to divide, _____ forms _____, which carry thousands of genes that make up our genetic blueprint. Each body cell, with the exception of the female ovum and the male spermatozoa, contains 23 pairs of chromosomes that determine its genetic makeup. In each of the 23 pairs, one of the chromosomes was inherited from the mother and the other from the father. About_______genes in the body determine unique human characteristics. Genes pass biological information from one generation to the next. This biological information includes such traits as hair color, body structure, and metabolic activity.
Cell
Chromatin chromosome
20k-25k
_______ is composed of similar cells that perform specialized or common functions. The study of tissues is called _____. Between the cells that make up tissues are varying amounts and types of _____, intercellular substances that provide pathways for cellular ______. The body contains ____ types of tissues:
Tissues
Histology
Non living
Interaction
Four
_______tissue covers surfaces of organs, lines cavities and canals, forms tubes and ducts, provides the_______ of glands, and makes up the outer layer (epidermis) of the skin. It is composed of cells arranged in a continuous sheet consisting of one or more layers.
Epithelial
Secreting portions
_______tissue supports and connects other body tissues. There are various types, including ______, _____ (fat), _____, _____ fiber, and even _____.
Connective
Cartilage
Adipose
Bone
Elastic
Blood
______ tissue provides the contractile tissue of the body, which is responsible for movement.
• ______ tissue transmits electrical impulses as it relays information throughout the entire body.
Muscle
Nervous
_____ are body structures that perform specialized functions. They are composed of two or more _______ types. For example, the stomach is made up of Muscle and connective tissue form the Wall of the
Inner and outer surfaces stomach. Epithelial and connective tissue cover ________ of the stomach. Nervous tissue penetrates the ______ lining of the stomach and its _____ wall to stimulate the release of chemicals for digestion.
Organs
Tissue
Epithelial
Muscular
A ______is composed of varying numbers of organs and _______ structures that have similar or related functions. For example, organs of the________ system include the esophagus, stomach, small intestine, and colon. Some of its accessory structures include the liver, gallbladder, and pancreas. The main function of the digestive system is to digest food, remove and absorb its nutrients, and expel waste products.
Body system
Accessory
Gastrointestinal
The highest level of organization is the ______. It is a complete living entity capable of independent existence. All complex organisms, including humans, are made up of several body systems that work together to sustain life
Organism
_______ is a body posture used among anatomists and clinicians as a position of reference to ensure uniformity and consistency in locating anatomical parts or divisions of the human body. In the anatomical position, the person stands erect, facing forward, and the arms are at the sides of the body, with the palms of the hands turned ______ and the feet _______ to each another. No matter how the body is actually positioned—standing or lying down, facing forward or backward—or how the limbs are actually placed, the positions and relationships of a structure are always described as if the body were in this position
Anatomical position
Forward
Parallel
A plane is an imaginary flat surface that divides the body into two sections. When the body is in anatomical position, the planes serve as points of reference to identify the different sections of the body. The most commonly used planes are ______ (frontal), ______ (horizontal), and ______ (median). The section is named for the plane along which it is cut. A coronal (frontal) plane divides the body into an _______ section; a transverse (horizontal) plane divides the body into ________ sections. The midsagittal plane runs through the center of the body, dividing the body into _________.
Coronal
Transverse
Midsagittal
Anterior and posterior
Top and bottom
Right and left
Halves
Before the development of modern imaging techniques, standard x-ray images showed only a single plane, and many body abnormalities were difficult, if not impossible, to see. Current imaging procedures, such as magnetic resonance imaging (MRI) and computed tomography (CT), produce ______-dimensional images on_______ plane. Thus, structural abnormalities and body masses that were previously not found using a standard single plane x-ray are now detected with scanning devices that show images taken in several body planes
Three
More than one
Directional terms help indicate the position of structures, surfaces, and regions of the body. These terms are always identified relative to the anatomical position. For example, the knee is superior to the ankle; the legs are inferior to the trunk. Physicians commonly use directional terms in medical reports and in communications with other health-care providers and patients. Directional terms identify the location of diseases, injuries, and surgical sites. In a clinical setting, health-care providers may describe the location of a heart attack to the patient as occurring in the front, or anterior, part of the heart. A tumor on the back of the kidney may be described as being located on the posterior Surface of the kidney
Oki dok
What types of terms are these?
Abduction, adduction, medial lateral superior, inferior proximal, distal, anterior posterior, parietal, visceral, prone, supine, inversion, E version, Palmar plantar superficial deep
Directional
The directional term for movement away from the _______ plane of the body or one of its parts.
The directional term for movement towards the _________ plane of the body
The directional term for pertaining to the midline of the body or structure
The directional term for pertaining to a side
-Abduction
-Midsagittal (median)2X
Median
Lateral
The directional term for towards the head or upper portion of a structure
The directional term for away from the head towards the tail or lower part of the structure
Superior/cephalad
Inferior /caudal