Riccardo's Science Blog

Function : The function of the immune system is to keep you alive and healthy, it attacks unknown cells in your body that could harm you, cancer cells for example. Organs : The immune system has two different types of organs, the primary organs which are the thymus and bone marrow. As well as the secondary organs which include lymph nodes, spleen, tonsils and adenoids, peyer's patches,skin and the appendix. The function of the thymus is to receive immature T cells that are produced in the red bone marrow and train them into functional, mature T cells that attack foreign cells. The function of the bone marrow is to produce all of the cells in the immune system. The lymph nodes separate out the lymphatic fluid , which is the store specific cellular material that will capture most cancers cells or bacterias which are travelling throughout the human body within the lymph fluid. The spleen acts as a filter for blood. Old red blood cells are recycled in the spleen, and platelets and whit...

Britannica.com Summary: Cells growing and dividing is known as cell division or mitosis. There are few steps to this process, the steps are  interphase, prophase, metaphase, anaphase, telophase and cytokinesis. Interphase is the processes were  cells grow, copy their DNA, and prepare for division. Prophase is were the cell's  chromatin condenses and turns into chromosomes. Metaphase is the step were t he chromosomes line up across the center of the cell.  When a naphase occurs, the centromeres split and the chromatids separate. During telophase a  nuclear cover forms around the chromosomes. At the final step, cytokenisis, t he cytoplasm splits moving organelles into the new cell. The DNA is copied before mitosis occurs to insure the new cell has the correct genetic information. S&EP 4: I used a flip book to  to display and analyze data. We drew the steps of mitosis slowly changing. This helped with the understanding of mitosis as you can see th...

www.pinterest.com Summary : A cell that is isotonic has it's water molecule and solute molecule at the same concentration level. In an isotonic solution, water molecules move into and out of the cell at the same rate, and the cell keeps it's normal shape. As well as there not being any net movement of water across the plasma membrane. A solution which contains a higher concentration of water and a lower concentration of solutes is called a hypotonic solution. Because the concentration of water is higher outside the cell, there is a net movement of water from outside into the cell. Since the cell gains water, it swells and the internal pressure increases and eventually the cell bursts. A cell that is hypertonic has a concentration with higher solute concentration and less water concentration. Since the concentration of water is higher within the cell, there is a net movement of water from inside to outside of the cell. (water leaves the cell through osmosis) Causing the...

Taken from the cell energy cycle gizmo Summary:   Cellular respiration is when your body converts oxygen and glucose into energy.  The oxygen humans and animals breathe breaks down, making glucose into tinier pieces so the body can use it.    Glucose, a sugar that your body needs to make energy, is very important to the processes of this cycle.  The formula for this process is C6H12O6 + O2 -----> CO2 + H2O + Energy. The o xygen that is in the equation is found in the mitochondrion and the glucose found is in the cytoplasm. During this processes, t he glucose molecule is split into two pyruvic acids which ends up producing a small amount of energy.    When the pyruvic acids move into the mitochondrion a huge amount energy is produced, along with carbon dioxide and water. F or photosynthesis however, the formula is H20 + CO2 ---(light energy)--> O2+ C6H12O6.  The carbon dioxide and water are found in the chloroplast ...