Science - Combined - 0653 CIE

Blood

Muhtasari

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.

Malengo

  1. [Core] List the components of blood as: red blood cells, white blood cells, platelets and plasma
  2. [Core] Identify red and white blood cells in photomicrographs and diagrams
  3. [Core] 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
  4. [Supplement] State the roles of blood clotting as preventing: blood loss and the entry of pathogens

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Maelezo ya Somo

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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Tathmini ya Somo

Hongera kwa kukamilisha somo la Blood. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.

Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.

Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.

  1. 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
  2. The liquid part of blood is called: A. plasma B. serum only C. haemoglobin D. fibrin Answer: A
  3. Blood clotting helps to: A. carry oxygen B. prevent blood loss and entry of pathogens C. produce hormones D. digest food Answer: B
  4. [Supplement] Antibodies are produced by: A. red blood cells B. platelets C. lymphocytes D. plasma Answer: C
  5. [Supplement] During clotting, fibrinogen is converted into: A. haemoglobin B. fibrin C. plasma D. platelets Answer: B

Fanyia kazi maswali haya kwenye programu

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Vitabu Vinavyopendekezwa

Cambridge IGCSE Biology Coursebook
Cambridge IGCSE Biology Coursebook
Manukuu: Fifth edition
Mchapishaji: Cambridge University Press
Mwaka: 2021
ISBN: 978-1-108-74880-2
Maelezo: Endorsed coursebook with full coverage of the 0610/0970 syllabus, practical investigations and exam-style questions.
Cambridge IGCSE Biology
Cambridge IGCSE Biology
Manukuu: Fourth edition
Mchapishaji: Hodder Education
Mwaka: 2021
ISBN: 978-1-5104-7864-0
Maelezo: Endorsed textbook covering the Core and Supplement content with clear biological diagrams and questions.

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