Circulatory continued Blood and Lymphatic system You have

Circulatory continued Blood and Lymphatic system

You have been given a work pack. DO NOT MOVE ON TO THE NEXT PAGE UNTIL TOLD SO, otherwise you will not have the necessary information to complete the tasks. RECAP You have been given a GREEN, YELLOW and RED task. Green is easy, yellow intermediate and Red more difficult. Choose which task you will like to complete. If you complete your task, try the nest one up. If you chose the most difficult, try and complete the others as well.

AIM: Review the circulatory system and it’s elements OBJECTIVES: Aims and Objectives Identify the components in blood Analyse the role of blood in the body Identify the structures of the Lymphatic system Connect structure to function in relation to the lymphatic capillaries.

What is in your blood? Blood Erythrocytes (RBC) Leukocytes (WBC) Plasma (90% water, sodium and potassium) Platelets Nutrients from digested food; glucose, amino acids, fatty acids, urea, lactic acid, serum albumin (a protein) Oxygen Carbon Dioxide What are the functions of the blood? Transport Protection Regulation

What is the Blood transporting? Oxygen to organs, tissues, and cells Carbon Dioxide back to the lungs to be removed. Nutrients so the cells can use them to grow, repair, create energy. TASK How does Blood help to protect animals? Carrying leukocytes ensures that foreign bodies are attacked. This is our immune system. What is meant by regulation? How does the blood regulate? Homeostatic abilities Vasodilation Vasoconstriction

The name Artery and Vein are given to a vessel based on their structures. Complete the check list table. Blood Vessels TASK

Structure Description Arteries Has a large lumen Blood Vessels Veins X Has high pressure X Has thick muscular walls X Has a small lumen X Has valves X Has low pressure X Is one cell thick Generally carries oxygenated blood Generally carries deoxygenates blood X X

Answer the following questions Why do arteries have a high pressure? Questions. Are veins generally heading towards or away from the heart? Explain why. How does vasodilation help to regulate body temperature?

Glossary words Circulatory system The Heart Blood/ Vessels Arteries Mitral Lumen Veins Tricuspid Leukocytes Arterioles Atrioventricular Erythrocytes Venules Semilunar Serum Albumin Hepatic Atrium Homeostasis Renal Ventricle Mesenteric Aorta/Aortic Pulmonary Vena Cava Review this for next week, there will be a starter task involving a spelling test next week.

The lymphatic system; THE LYMPHATIC SYSTEM The lymphatic system aids the immune system in removing and destroying waste, debris, dead blood cells, pathogens, toxins and cancer cells. The lymphatic system absorbs fats and fatsoluble vitamins from the digestive system and delivers these nutrients to the cells of the body where they are used by the cells. This is why lymph fluid that drains from small intestine takes on a MILKY (cloudy) appearance. The lymphatic system removes excess fluid and waste products from the interstitial spaces between the cells.

ORGANS AND STRUCTURES

The lymphatic system transports ‘LYMPH’ the liquid found in the interstitial spaces between cells towards a lymph node. All lymphatic vessels will at some point travel through a lymph node. The fluid is dropped off here and is then reinserted back into the veins. Transport This is to ensure the regulation of fluid throughout the body. WHAT IS LYMPH? Derived from TISSUE FLUID and BLOOD PLASMA Very similar to blood plasma but has less protein and more liquid Clear therefore contains NO haemoglobin

2 identical lobes located in front of the heart and behind the sternum Thymus most active in newborn babies and children Helps white blood cells to specialise in recognising certain ‘invaders’ (e. g. bacteria and viruses) Produces a special WBC known as a T -cell

Largest lymphatic organ Specialised to filter blood Spleen Destroys old and abnormal erythrocytes (RBCs) Important store of red blood cells When blood passes through the spleen, white blood cells attack any infections

Use this diagram to help you fill in the diagram in your work book. Dog Lymphatic System