SNC 2D: Tissues, Organs and Systems

SNC 2D: Tissues, Organs and Systems Recognize the basic structure of cells Identify specialized cells Understand the connection between specialized structures and functions of some plant and animal cells Specialized cells – learning goals

SNC 2D: Tissues, Organs and Systems CELLS: Basic Structure Cell membrane Cytoplasm Nucleus Cell Wall Vacuole Chloroplast

SNC 2D: Tissues, Organs and Systems All cells have these features in common: a nucleuscontains genetic material which controls the cell's behaviour. cytoplasmwhere chemical processes take place a cell membranewhich controls what passes into and out of the cell

SNC 2D: Tissues, Organs and Systems Some Specialized Cells - Recognize Any?

SNC 2D: Tissues, Organs and Systems Image 1 - Red Blood Cells Image 3 - Nerve Cells Image 2 - Sperm Cells Specialized Animal Cells

SNC 2D: Tissues, Organs and Systems Image 1 - Red Blood Cells Example of cellSpecific functionSpecialized features suited to the function Red blood cell Carry oxygen to the cells 1. Thin outer membrane allows oxygen to diffuse through easily. 2. No nucleus means that the whole cell is full of haemoglobin (which carries the oxygen)

SNC 2D: Tissues, Organs and Systems Image 2 - Sperm Cells Example of cellSpecific functionSpecialized features suited to the function Sperm cell (male gamete) To fertilize the egg cell (female gamete) 1. The head, contains DNA 2. The middle section, is full of mitochondria for energy. 3. The tail moves the sperm to the egg.

SNC 2D: Tissues, Organs and Systems Image 3 - Nerve Cells Example of cellSpecific functionSpecialized features suited to the function Nerve cell (motor neurone) Pass sensory impulses from one area to another 1. Dendrites make connections with other neurones. 2. Long nerve fibre to carry the impulse

SNC 2D: Tissues, Organs and Systems Image 4- Leaf Cells Image 5- Pollen Cell Image 6 - Guard Cells Specialized Plant Cells

SNC 2D: Tissues, Organs and Systems Image 4- Leaf Cells Example of cellSpecific functionSpecialized features suited to the function Leaf palisade cell Carries out photosynthesis Packed with chloroplasts

SNC 2D: Tissues, Organs and Systems Image 5- Pollen Cell Example of cellSpecific functionSpecialized features suited to the function Pollen cell (male gametes) Fertilize the ovules (female gametes) 1. Have a hard protective outer coat to survive bad conditions. 2. Shape and surface of outer coat is adapted to method of dispersal

SNC 2D: Tissues, Organs and Systems Image 6 - Guard Cells Example of cellSpecific functionSpecialized features suited to the function Guard cellOpens/closes leaf pore 1. Regulate the size of leaf pore 2. Change shape easily

SNC 2D: Tissues, Organs and Systems Photos and images are credited as follows: Image 1 – red blood cells. In the public domain as work of the US federal government Image 2 – Sperm cells. Photo courtesy of Gilberto Santa Rosa. This photo is licensed under Creative Commons Attribution 2.0 license. Image 3 – Nerve cells. Photo courtesy of Fanny CASTETS. This photo is licensed under the Creative Commons Attribution ShareAlike 2.5, Attribution ShareAlike 2.0 and Attribution ShareAlike 1.0 License. Nerve cells. Photo courtesy of Fanny CASTETS. This phot Image 4 – LeafImage 4 – Leaf cells. Photo courtesy of Kristian Peters. This image is published under the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.istian Peters. This image Documentation License, Vehed by the Free Software Foundation. Image 5 – Guard Cells. Photo courtesy of KuriPop. The image has been cropped to show only the open stomatal pore. The scale has been removed. This image is published under the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation. the open stomatal pore. The slater version published by the Free Software Foundation. Image 6 – Pollen cell. In the public domain, all rights permitted. See page for other images of specialized cells