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ANATOMY OF FLOWERING PLANTS

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  What is Plant Anatomy? Plant anatomy is the study of internal structure and organization of tissues in plants. It helps in understanding: Functional adaptation Transport system Growth patterns Tissue Organization in Flowering Plants Flowering plants have three major tissue systems :  Epidermal Tissue System Components: Epidermis Single layer of compact cells No intercellular spaces Covered by cuticle (except roots) Cuticle Made of cutin Prevents water loss Stomata Present mainly on leaves Composed of guard cells Regulate: Gas exchange Transpiration Root hairs Extensions of epidermal cells Increase surface area for absorption Trichomes (in stem) Hair-like structures Protection + reduce transpiration  Functions: Protection Water conservation Gas exchange 🌿 B. Ground Tissue System  Types of Ground Tissue: 1. Parenchyma Living cells, thin cell wall Large vacuole Functions: Storage Photosynthesis ( chlorenchyma ) Air storage ( aerenchyma ) 2. Collenchyma Living cell...

Human Reproduction Summary Notes

  Male Reproductive System Primary sex organs: A pair of testes suspended in the scrotum Secondary sex organs:  A pair of ducts each differentiated into rete testis, vasa efferentia, epididymis and vas deferens, ejaculatory duct and the associated glands External genitalia: Penis Gametogenesis (Spermatogenesis) The process of formation of male gametes (sperms) in the testes Spermatogonia (immature male germ cells) undergo mitotic division to increase in number Spermatogonia differentiate into primary spermatocytes Primary spermatocytes undergo meiotic division to produce secondary spermatocytes Secondary spermatocytes undergo meiotic division to produce spermatids Spermatids are transformed into spermatozoa by the process of spermiogenesis Hormonal Control of Spermatogenesis Gonadotropin releasing hormone (GnRH) is secreted by the hypothalamus GnRH stimulates the anterior pituitary to secrete luteinizing hormone (LH) and follicle stimulating hormone (FSH) LH acts on Leydig cel...