Flashcards for Miss DiVito’s 7th grade end of year review

Term Definition
Heart The hollow, 4 chamber muscular organ that pumps blood through the body by contracting and relaxing.
Hemoglobin An iron-containing protein that binds chemically to oxygen molecules, makes up most of red blood cells.
Plasma The clear,yellowish fluid portion of blood, lymph, or intramuscular fluid in which cells are suspended.
Platelets Small, round cell fragments containing no nuclei that are found in the blood and help in the clothing of blood.
Red Blood Cell A disk-shaped cell in the blood that contains hemoglobin, lacks a nucleus, and transports oxygen and carbon dioxide to and from the tissues.
Valve A flap like structure in a hollow organ, such as the heart, that controls the one-way passage of fluid through that organ.
Vein Any of the blood vessels that carry deoxygenated blood toward the heart from the body's cells, tissues, and organs.
Ventricle A chamber of the heart that receives blood from one or more atria and pumps it by muscular contraction into the arteries.
White Blood Cell Colorless cells in the blood that help combat infection
Rough Endoplasmic Reticulum Found in plat and animal cells. A maze of tubular passageways throughout the cell. The transportation system for the cell-helps to move substances through the cytoplasm of the cell.The rough one has ribosomes attached to it's surface.
Smooth Endoplasmic Reticulum The rough and smooth one are both almost the same except the smooth one does not have ribosomes attached to its surface.
Vacuoles Found in plant and animal cells- BUT there is only one large one in plant cells, an animal cells have a few little ones. These are the storage tanks for the cell-they store water, food, waste, enzymes, ect.
Cells The basic unit of structure and function in living things.
Hierarchical The arrangement of a particular set of items that are represented as being "above,""below," or "at the same level as" one another.
Organ System Two or more organs working together in the execution of a specific body function.
Organelles A structure within a cell that carries out the various processes necessary for a cell to function properly.
Organism A life form such as animal, fungus, micro-organism, or plant that in some form is capable of response to stimuli, reproduction, growth, development, and maintenance of homeostasis.
Organs A collection of tissues joined into a structural unit that serves a common function.
Specialized Cell a type of cell that performs a specific function in multicellular organisms. They work together to form a tissue.
Tissue a group of cells from the same origin that together carry out a specific function.
Alleles The different forms of gene.
Asexual Reproduction A form of reproduction in which a new organism is created from a single parent and inherits the genes of that parent only.
Binary Fission A subdivision of a cell into two or more parts and the regeneration of those parts into two separate cells.
Budding A form of asexual reproduction in which a new organism grows on another one. The new organism remains attached as it grows, separating from the parent organism only when it is mature.
Dominant Allele a form of a gene, whose trait always shows up in an organism when the it is present and working correctly.
Egg cell The "female" sex cell; contains 1/2 the genetic information of the female parent.
Fertilization The process in which the sex cells of different organisms of the same species combine to produce a new organism.