The throat is a part of the neck. It consists of the pharynx and larynx. The throat also contains blood vessels and muscles of the pharynx. You can consider a consultation with a throat specialist in "otorhinolaryngology", because finding or coughing blood from this area can be due to many reasons such as bleeding gums, laryngitis, bronchiectasis, bronchitis, irritation of the throat via violent coughing, nosebleed etc. To be sure, it seems best to consult a specialist.