22011514-086 zoo-201 ppt.pptx for helping in exams
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Rotifera are a phylum of small invertebrates that are commonly found in freshwater environments. They have bilateral symmetry, pseudocoelomate bodies, and a covering called a lorica. Their digestive systems have a muscular pharynx called a mastax lined with cuticle that helps grind food particles less than 10 micrometers in size. They excrete waste through protonephridia and reproduce primarily through parthenogenesis, though sexual reproduction also occurs. There are three main classes - Bdelloidea, Monogononta, and Seisonidea.
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The term porifera coined by Robert Grant
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Arthropoda is the largest and most successful phylum in the world. Here are the slides that can help you understand the basics of this phylum.
Hope it will be helpful for you!
PHYLUM PORIFERA
The term porifera coined by Robert Grant
Porifera (pori - pore ; fera - bearing)
They are commonly called as sponges
They are multicellular animals
No true tissue ,organs
They are generally marine except potamolepidae and spongillidae which are fresh water sponges
They are radially symmetrical or asymmetrical
2 skeleton compositions: spicules or spongin
• spicules – made of silica (glass) or calcium and offer protection
• spongin – protein based flexible fibers; used as commercial sponges (bath sponges)
The body wall composed of two layers :
Outer layer composed of epidermis / pinacoderms
Inner layer composed of choanoderm
Inner and outer layer are separated by a gelatinous matrix called mesohyl.
Water transport system
water enters in through the tiny pores (ostium) into the central cavity of the sponge (spongocoel) which is lined with choanocytes and leaves through the large opening on top of the sponge (osculum)
This transport of water helps in gathering food respiratory exchange of gases and removal of wastes (excretion)
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Digestion is intracellular
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Nerve cells and sensory cells are absent
They are hermaphroditic (both egg cells and sperms are produced by same individual)
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Fertilization is internal
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Power of regeneration is well developed
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𝐃𝐢𝐬𝐜𝐮𝐬𝐬 𝐭𝐡𝐞 𝐄𝐏𝐏 𝐂𝐮𝐫𝐫𝐢𝐜𝐮𝐥𝐮𝐦 𝐢𝐧 𝐭𝐡𝐞 𝐏𝐡𝐢𝐥𝐢𝐩𝐩𝐢𝐧𝐞𝐬:
- Understand the goals and objectives of the Edukasyong Pantahanan at Pangkabuhayan (EPP) curriculum, recognizing its importance in fostering practical life skills and values among students. Students will also be able to identify the key components and subjects covered, such as agriculture, home economics, industrial arts, and information and communication technology.
𝐄𝐱𝐩𝐥𝐚𝐢𝐧 𝐭𝐡𝐞 𝐍𝐚𝐭𝐮𝐫𝐞 𝐚𝐧𝐝 𝐒𝐜𝐨𝐩𝐞 𝐨𝐟 𝐚𝐧 𝐄𝐧𝐭𝐫𝐞𝐩𝐫𝐞𝐧𝐞𝐮𝐫:
-Define entrepreneurship, distinguishing it from general business activities by emphasizing its focus on innovation, risk-taking, and value creation. Students will describe the characteristics and traits of successful entrepreneurs, including their roles and responsibilities, and discuss the broader economic and social impacts of entrepreneurial activities on both local and global scales.
Temple of Asclepius in Thrace. Excavation results
The temple and the sanctuary around were dedicated to Asklepios Zmidrenus. This name has been known since 1875 when an inscription dedicated to him was discovered in Rome. The inscription is dated in 227 AD and was left by soldiers originating from the city of Philippopolis (modern Plovdiv).
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Educational Technology in the Health Sciences
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Wound healing PPT
This document provides an overview of wound healing, its functions, stages, mechanisms, factors affecting it, and complications.
A wound is a break in the integrity of the skin or tissues, which may be associated with disruption of the structure and function.
Healing is the body’s response to injury in an attempt to restore normal structure and functions.
Healing can occur in two ways: Regeneration and Repair
There are 4 phases of wound healing: hemostasis, inflammation, proliferation, and remodeling. This document also describes the mechanism of wound healing. Factors that affect healing include infection, uncontrolled diabetes, poor nutrition, age, anemia, the presence of foreign bodies, etc.
Complications of wound healing like infection, hyperpigmentation of scar, contractures, and keloid formation.
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- 1. Phylum Rotifera Submitted By: Bushra Afzal ROLL NO: 22011514-086 Course Tittle: Animal diversity-l Course Code:Zoo-201 Submitted to:Ma'am Maryam Khalid
- 3. Diagram
- 4. General characteristics • Triploblastic • Bilateral symmetry • Pseudocoelomate • Unsegmented • Lorica(covering) • Eutelic
- 5. Body wall Body of phylum Rotifera generally lacks a cuticle And thickened into stiff plates or lorica into which the head may retreat. • Anterior end with a ciliated organ called corona, • Help in feeding and swimming. • Cuticle secreted with in epidermis and never molted. • Pseudocoelomate animals
- 6. Digestion and nutrition • Digestive system with a highly mascular pharynx called mastax lined internally with cuticle. • Trophy (rigid structure) within mastax help in grasping and grinding the pray. • Rotifer diet is bacteria, algae and protozoans. • Particle eaten are 10 micrometers or less.
- 7. Excretion • Excretory organ are protonephridia with flame cells. • The protonephridia function in osmoregulation.
- 8. Nervous system • Nervous system include cerebral ganglion with longitudinal nerve cord.
- 9. Reproduction • Dioecious - reproduce sexually • Females are larger than male.
- 10. Reproduction • Parthenogenesis is largely present in phylum Rotifera. • Spiral cleavage • No larval stage in the life cycle.
- 11. Rotifer taxonomy • Class Bdelloidea (350 species) • Order Bdelloida • Class Monogononta (largest class-1500 species) • Order collothecida • Order Floscuriida • Order ploimida • Class Seisonidea • Order seisonida
- 12. Where can you find a rotifer? • Common in fresh water-planktonic • Only a few are found in salt water • Can be free swimming, sessile or move by inch worming.