Body Systems
This system includes the bones of the body
skeletal system
This is the general word for substances in food that provide raw material's the cells need to carry out essential processes
nutrients
This is the smallest unit of structure in living things
cell
This is a double helix molecule that contains the genetic code for a living thing
DNA
This describes how well an organism can survive and reproduce in its environment.
fitness
This body system includes the skin and protects the body
integumentary system
This is the nutrient that includes sugars and starches; they break down quickly and are a fast source of energy.
carbohydrates
This is a blood vessel that carries blood away from the heart
artery
This is the passing of traits from parents to offspring, and was studied by Gregor Mendel
heredity/inheritance
This is the struggle among organisms to survive as they use the same limited resources
competition
This body system defends the body against foreign invaders like bacteria and viruses
immune system
These are proteins that speed up chemical reactions in the body.
enzymes
This is a group of tissues working together for a specific function
organ
This is the molecule that carries the genetic code from the nucleus to the cytoplasm and ribosome, where it can be used to make proteins
messenger RNA
This is a young organism that develops from a fertilized egg called a zygote
embryo
This body system sends electrical and chemical signals, and acts as a communication system through the body.
nervous system
This is the nutrient that helps your body with chemical reactions. These do not provide energy. The human body can make some types, but others need to be taken in with food.
vitamins
This is an organ that produces and release chemicals that can help control body processes
gland
This is the physical trait seen in an organism, as coded for by its alleles
phenotype
This is what evolutionists call similar structures that related species have inherited from a common ancestor.
homologous structures
This body system transports oxygen, food, and waste throughout the body to deliver materials to cells
circulatory system
This is the nutrient that helps your body with chemical reactions, and includes calcium and iron.
These are tiny thin-walled sacs of lung tissue where gases can move between air and blood
alveoli
This molecule carries amino acids to the ribosome during protein synthesis
transfer RNA
This theory claims two different species once lived together, and eventually one organism moved inside another organism's cells.