23
January
2007
January
2007
Today in science
In science today we studied the human body.Cells work together to make tissues,the type of tissues are bone,muscle,and nerve.The tissues work together to make an organ.The types of organs are brain,stomach and heart.Organs work together and make systems.Types of systems are skeletal,muscular,circulatory,digestive,respiratory,excretory,endocrine,and the nervous.The cell membrane surrounds the entire cell,and lets things in and out.Cytology is the study of cell.Cyptoplasm is jelly like substance that is around the nucleus.
