Cell organelles
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Cell Organelles. Continuous……. The Cytoskeleton الهيكل الخلوى. A network of fibres شبكة من الالياف that p rovide structural support تدعيم to the cell. Pages 126 - 131. Intermediate filaments. Microtubules. Microfilaments. ألياف متوسطة. ألياف دقيقة. أنيبيبات دقيقة. Thick. Thin.

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Cell Organelles

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Cell organelles

Cell Organelles

Continuous……..


The cytoskeleton

The Cytoskeletonالهيكل الخلوى

A network of fibresشبكة من الالياف that provide structural supportتدعيم to the cell

Pages 126 - 131


Cytoskeleton

Intermediate

filaments

Microtubules

Microfilaments

ألياف متوسطة

ألياف دقيقة

أنيبيبات دقيقة

Thick

Thin

Middle

سميكة

رفيعة

متوسطة

Cytoskeleton

Responsible for cell motilityحركة ,.

(Tubulin protein)

transport materials within the cellنقل المواد داخل الخلية.

(Actin protein)

Support the cell shape شكل الخلية

(Fibrous protein)

Page 126 - 131


Cell organelles

Page 127


Cell organelles

The Cytoskeletonالهيكل الخلوى

Functions of the cytoskeleton

1. The cytoskeleton provides mechanical supportدعم and maintains shape of the cellيحافظ على شكل الخلية .

2. The cytoskeleton also plays a major roleيلعب دور اساسي in cell motility حركة الخلية

Fig. 7.21a, Page 126


Cell organelles

7- Cell membrane

  • The plasma membrane functions as a selective barrier حاجز إختيارى that allows passage of oxygen, nutrients, and wastes for the whole volume of the cell.

Fig. 7.6, Page 113, and Fig. 7.29 Page 133


Cell membrane

Carbohydrate chains

Proteins

Cell membrane

Composed of lipids (phospholipids) and proteins

Lipid layer contains hydrophilic and hydrophobic regions

Hydrophilicمُحب للماء

Phospholipid

Hydrophobicكاره للماء

Fig. 7.6 Page 113, and Fig. 7.29 Page 138


Cell organelles

Comparison between Prokaryotes and Eukaryotes


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