10th Class Science Human Reproduction Sexually Trnsmitted Disease (STD)

         Sexually Transmitted Disease (STD)

A sexually transmitted disease (STD), also known as a sexually transmitted infection (STI), or venereal disease (VD), is an illness that has a significant probability of transmission between humans by means of human sexual behavior, including vaginal intercourse, oral sex, and anal sex. While in the past, these illnesses have mostly been referred to as STDs or VD, in recent years the term sexually transmitted infections (STIs) has been preferred, as it has a broader range of meaning; a person may be infected, and may potentially infect others, without showing signs of disease. Some STIs can also be transmitted via the use of IV drug needles after its use by an infected person, as well as through childbirth or breast-feeding. Sexually transmitted infections are as follows:

             Bacterial

• Chancroid
• Chlamydia
• Granuloma inguinale
• Gonorrhea
• Syphilis

            Fungal

• Candidiasis

           Viral

• Micrograph showing the viral cytopathic effect of herpes.
• Viral hepatitis
• Herpes simplex
• HIV (Human Immunodeficiency Virus)
• HPV (Human Papilloma Virus)
• Molluscum contagiosum

            Parasites

• Crab louse, colloquially known as "crabs" or "pubic lice"
• Scabies

            Protozoal

• Trichomoniasis

         The male reproductive organ of flower is called:

(a) Stamen

(b) Carpel        

(c) Petals

(d) Sepals

(e) None of these

Answer: (a)

         Which one of the following flower is bisexual?

(a) Rose

(b) Jasmine       

(c) Hibiscus

(d) Lotus                                             

(e) None of these

Answer (c)

         Which one of the following animals shows external fertilization?

(a) Birds

(b) Toads         

(c) Reptiles        

(d) Goat

(e) None of these

Answer (b)

       Which one of the following is a male sex chromosomes?

(a) XX

(b) YY            

(c) XY  

(d) All of these

(e) None of these

Answer: (c)

• Did you know that the largest cell in the human body is the female egg and the smallest is the male sperm?
• Your teeth start growing 6 months before you are born.
• The color of your eyes depends on the genes you get from your parents, but at birth most babies appear to have blue eyes.

• The process of production of organisms of its own king is called reproduction.
• There are two methods of reproductions, sexual and asexual.
• Reproduction involves DNA copying.
• The different methods of asexual reproductions are fission, regeneration, vegetative propagation, grafting, budding, fragmentation etc.
• The male reproductive system consists of testis, vas deferens, seminal vesicles, prostate gland, urethra and penis.
• The female reproductive system consists of ovary, fallopian tube, uterus, and vagina.
• Different methods of birth controls are condoms, IUDC, copper-T, oral pills etc.