Sciences - Co-ordinated (9-1) - 0973 CIE

Blood

Bayani Gaba-gaba

Blood is far more than a red liquid. It is a living tissue: red cells packed with oxygen, white cells hunting invaders, tiny platelets ready to seal a wound, all carried in a straw-coloured fluid that ferries food, waste, hormones and heat around your body.

In this lesson you will learn the four components of blood and what each one does, and how to recognise red and white cells. Extended students will tell phagocytes from lymphocytes, learn their separate roles in defence, and follow the chemistry of how a clot forms.

Manufura

List the components of blood as: red blood cells, white blood cells, platelets and plasma
Identify red and white blood cells in photomicrographs and diagrams
State the functions of the following components of blood: (a) red blood cells in transporting oxygen, including the role of haemoglobin (b) white blood cells in phagocytosis and antibody production (c) platelets in clotting (details are not required) (d) plasma in the transport of blood cells, ions, nutrients, urea, hormones and carbon dioxide
State the roles of blood clotting as preventing blood loss and the entry of pathogens
[Supplement] Identify lymphocytes and phagocytes in photomicrographs and diagrams
[Supplement] State the functions of: (a) lymphocytes - antibody production (b) phagocytes - engulfing pathogens by phagocytosis
[Supplement] Describe the process of clotting as the conversion of fibrinogen to fibrin to form a mesh

Takardar Darasi

Blood links almost every system in the body: transport, gas exchange, defence and repair all depend on it. Knowing the job of each component lets you answer questions across the whole syllabus, from how oxygen reaches a muscle to how the body fights an infection.

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Nazarin Darasi

Barka da kammala darasi akan Blood. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.

Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.

Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.

Which part of the blood is packed with haemoglobin and carries oxygen around the body? A. white blood cells B. red blood cells C. platelets D. plasma Answer: B
The liquid part of blood is called: A. plasma B. serum only C. haemoglobin D. fibrin Answer: A
Blood clotting helps to: A. carry oxygen B. prevent blood loss and entry of pathogens C. produce hormones D. digest food Answer: B
[Supplement] Antibodies are produced by: A. red blood cells B. platelets C. lymphocytes D. plasma Answer: C
[Supplement] During clotting, fibrinogen is converted into: A. haemoglobin B. fibrin C. plasma D. platelets Answer: B