Vocabulary Unicellular- made up of only one cell. Multicellular- made up of more than one cell. Cytoplasm-jelly like fluid has many chemicals that help cell stay alive Organelle- means "little organ" structures inside the cell that carry out different functions. Nucleus - cell's command center. controls cell actions, contains the DNA Membrane- holds the parts of the cell together, provides a barrier between the cell and its surroundings
Cells Cells are the building blocks of life. Cells are the smallest part of a living thing that can carry out all the processes of life. Functions of cells: Take in nutrients and remove waste. Fight disease. Transport oxygen Carry signals from the brain to muscles for movement.
Parts of a Cell Cell membrane- a covering that holds parts of the cell together. Nucleus- controls the cell’s activities. The nucleus is enclosed in its own membrane. Cytoplasm- jellylike substance containing many chemicals to keep the cell functioning. s/cells/ s/cells/
Single-Celled Organisms Some organisms are made up of only one cell called single- called organisms. Also known as unicellular. They perform all life processes within a single cell. Single-Celled Organisms are simple life forms. Examples: bacteria, algae, amoeba (animal that lives in pond water, or salt water, animals, and humans) They move, find food, grow, and make new organisms.
Multi-Celled Organisms Multi-celled organisms are made up of more than one cell. Plants, animals, and other living things are made up of many cells. Made up of different types of cells that have certain jobs to do. Nerve cells, white blood cells, red blood cells, and nerve cells.
Tissue Similar cells that work together form tissue. Tissues that work together form organs (major body parts ex: heart, liver, kidneys, and lungs). The organs work together as a system to perform a job in order to keep the animal or human alive. Organs that work together to perform a function form a system. Humans have ten major body systems.
Cell Transport