Human Biology - 4HB1 PearsonEdexcel

Tissues And Specialised Cells

Muhtasari

No single cell can beat like a heart, carry oxygen, or think. Those jobs need thousands of similar cells working together as a tissue, and organs such as the heart or brain are themselves built from several different tissues layered and combined for a shared purpose.

In this lesson you will learn how bone, muscle, blood, nervous tissue and epithelium each look under a light microscope and how their structure suits their job, then examine how the egg and sperm, the two most specialised cells in the human body, are each built for a single event: fertilisation.

Malengo

  1. Understand that cells are grouped into tissues and that tissues are organised into organs
  2. Describe the structure of bone, muscle (voluntary, involuntary and cardiac, as observed under a light microscope), blood, nervous tissue and epithelium (squamous and ciliated, with reference to cells lining the cheek and trachea)
  3. Describe the structure of cells specialised for reproduction, e.g. egg (ovum) and sperm and relate their structure to function

Maelezo ya Somo

A single specialised cell is rarely useful on its own. A tissue is a group of similar cells, working together to carry out a shared function. An organ is a structure made of two or more different tissues working together to perform a more complex job. The heart, for example, is an organ built from muscle tissue that contracts, nervous tissue that coordinates the contraction, and epithelial tissue lining its chambers.

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Tathmini ya Somo

Hongera kwa kukamilisha somo la Tissues And Specialised Cells. 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 muscle type shows branched fibres joined by intercalated discs? A) Voluntary muscle B) Involuntary muscle C) Cardiac muscle D) Smooth muscle Answer: C
  2. Which type of epithelium lines the trachea? A) Squamous epithelium B) Ciliated epithelium C) Cardiac tissue D) Compact bone Answer: B
  3. What is the main function of a lymphocyte? A) Engulfing bacteria by phagocytosis B) Producing antibodies C) Carrying oxygen D) Clotting blood Answer: B
  4. Which structure at the tip of a sperm cell contains enzymes that digest a path into the egg? A) Flagellum B) Midpiece C) Acrosome D) Nucleus Answer: C
  5. A tissue is best described as: A) A single specialised cell B) A group of similar cells working together for a shared function C) Two or more different organs working together D) A structure made only of nervous tissue Answer: B

Inapatikana kwenye programu ya Green Bridge

Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.

Maelezo kamili ya masomo yenye michoro
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Soma bila mtandao, wakati wowote, mahali popote
Inapatikana kwa Android, Windows, macOS, na Linux

Inapatikana kwenye programu ya Green Bridge

Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.

Maelezo kamili ya masomo yenye michoro
Msaidizi wa kujifunza wa AI
Soma bila mtandao, wakati wowote, mahali popote
Inapatikana kwa Android, Windows, macOS, na Linux

Fanya Mazoezi ya Maswali ya Majaribio

Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Tissues And Specialised Cells? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.

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