The water circulation system of sponges, also known as canal system, is the defining property of the phylum Porifera. The system of canals is also known as the auriferous system. The sponge canal system aids in food uptake, respiratory gas exchange, and excretion. Many pores on the body surface of sponges allow for the admission … Read more
What is Phylum Platyhelminthes? Definition of Phylum Platyhelminthes Phylum Platyhelminthes, also known as flatworms, comprises bilaterally symmetrical, triploblastic, dorsoventrally flattened invertebrates lacking circulatory, respiratory, and skeletal systems, characterized by a simple digestive system with a single opening and a protonephridial excretory system. Characteristics of Phylum Platyhelminthes Classification of Phylum Platyhelminthes Class 1- Turbellaria (L., turbella= a little … Read more
What is Phylum Porifera? – Definition of Phylum Porifera Phylum Porifera refers to a group of simple, sessile aquatic animals commonly known as sponges. Sponges lack true tissues and organs and have a porous body structure with numerous channels and chambers that allow water to flow through them. They feed by filtering small particles from … Read more
Origin of Parazoa Choanoflagellate: Link to sponges Sponges’ internal chambers are bordered by a series of specialised cells known as choanocytes (choano = collar; cyte =cell). These are the cells that feed sponges. Each choanocyte, like choanoflagellates, possesses a collar of tentacles enclosing a single anterior flagellum. By undulating dozens of flagella, choanocytes generate a … Read more
Reproduction in Protista Methods of Reproduction in Protists The following paragraphs emphasise the two essential reproductive strategies of protists. The procedures are: A. Asexual Reproduction in Protists Mode of Asexual Reproduction In Protista 1. Binary Fission Mitosis is the division of the parent cell into two identical daughter cells. Examples: Amoeba, Euglena and Paramecium. 2. … Read more
What is contraceptive? Definition of contraceptive A contraceptive is a method or device used to prevent pregnancy by intentionally interfering with the natural process of reproduction. Modern Contraceptive Technologies There are various modern contraceptive technologies available to individuals and couples for effective family planning. Here is a list of commonly used modern contraceptive technologies: Disadvanatages … Read more
Wha do you mean by Assisted Reproductive Technology? Assisted Reproductive Technology (ART) refers to a range of medical procedures and techniques used to help individuals or couples conceive a child when they are facing fertility challenges. ART methods involve the manipulation of human eggs, sperm, or embryos in a laboratory setting to facilitate conception. There … Read more
What is Infertility? Definition of Infertility Infertility is the inability to conceive or achieve a successful pregnancy after a year or more of regular, unprotected sexual intercourse. Causes of Infertility in Male There are several potential causes of infertility in males. Some common factors that can contribute to male infertility include: Causes of Infertility in … Read more
What is Reproductive System? The reproductive system, also known as the genital system or the reproductive tract, is a collection of organs and structures in the human body that are involved in the process of sexual reproduction. Its primary function is to produce, nurture, and deliver gametes (sex cells) and facilitate the union of sperm … Read more
What is Gonad? Origin of Gonads Structure and Location of Gonads 1. Ovaries 2. Testes Gonadal hormones Female Gonad Hormones Female gonad hormones play a crucial role in the reproductive system and the development of female characteristics. The two major hormones produced by the ovaries are progesterone and estrogens. Overall, estrogens and progesterone are essential … Read more
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